These acts have the same result, but the intention and circumstances surrounding the act are different. Thus the acts are differentiated categorically.
Similarly, the taking of another's property without his consent is normally immoral, but under specific circumstances, the taking of another's property without his consent may be moral, as in the case of the taking of food from a supermarket without the owner's consent in the aftermath of a natural disaster. The object of the act is the same, but given different circumstances surrounding the act, the act may or may not accord with reason, and will be categorized as good or evil. The act derives its species from the object of the act, the intention of the actor, and the circumstances surrounding the act.
Question 18. The good and evil of human acts, in general
How does one determine the justness of a war?
Did God know beforehand of the fall?
Yes.
How is it, that if God is the creator of all, He is not the creator of evil also?
In the light of Catholic doctrine, any theory that may be held concerning evil must include certain points bearing on the question that have been authoritatively defined. These points areCan evil be the opposite of God? If so, then wouldn't that make evil equal to God, how is that possible?1) the omnipotence, omniscience, and absolute goodness of the Creator;A complete account may be gathered from the teaching of St. Thomas Aquinas, by whom the principles of St. Augustine are systematized, and to some extent supplemented. Evil, according to St. Thomas, is a privation, or the absence of some good which belongs properly to the nature of the creature. (I,Q. xiv, a. 10; Q. xlix, a. 3; Contra Gentiles, III, ix, x). There is therefore no "summum malum", or positive source of evil, corresponding to the "summum bonum", which is God (I, Q. xlix, a. 3; C. G., III, 15; De Malo, I, 1); evil being not "ens reale" but only "ens rationis"--i.e. it exists not as an objective fact, but as a subjective conception; things are evil not in themselves, but by reason of their relation to other things, or persons. All realities (entia) are in themselves good; they produce bad results only incidentally; and consequently the ultimate cause of evil if fundamentally good, as well as the objects in which evil is found (I, Q. xlix; cf. I, Q. v, 3; De Malo, I, 3). Thus the Manichaean dualism has no foundation in reason.2) the freedom of the will; and
3) that suffering is the penal consequence of wilful disobedience to the law of God.
Evil is threefold, viz., "malum naturæ" (metaphysical evil), "culpæ" (moral), and "paenæ" (physical, the retributive consequence of "malum culpæ") (I, Q. xlviii, a. 5, 6; Q. lxiii, a. 9; De Malo, I, 4). Its existence subserves the perfection of the whole; the universe would be less perfect if it contained no evil. Thus fire could not exist without the corruption of what it consumes; the lion must slay the ass in order to live, and if there were no wrong doing, there would be no sphere for patience and justice (I, Q. xlviii, a. 2). God is said (as in Isaiah 45) to be the author of evil in the sense that the corruption of material objects in nature is ordained by Him, as a means for carrying out the design of the universe; and on the other hand, the evil which exists as a consequence of the breach of Divine laws is in the same sense due to Divine appointment; the universe would be less perfect if its laws could be broken with impunity. Thus evil, in one aspect, i.e. as counter-balancing the deordination of sin, has the nature of good (II, Q. ii, a. 19). But the evil of sin (culpæ), though permitted by God, is in no sense due to him (I, Q. xlix, a. 2).; its cause is the abuse of free will by angels and men (I-II, Q. lxxiii, a. 6; II-II, Q. x, a. 2; I-II, Q. ix, a. 3). It should be observed that the universal perfection to which evil in some form is necessary, is the perfection of this universe, not of any universe: metaphysical evil, that is to say, and indirectly, moral evil as well, is included in the design of the universe which is partially known to us; but we cannot say without denying the Divine omnipotence, that another equally perfect universe could not be created in which evil would have no place.
St. Thomas also provides explanations of what are now generally considered to be the two main difficulties of the subject, viz., the Divine permission of foreseen moral evil, and the question finally arriving thence, why God choose to create anything at all. First, it is asked why God, foreseeing that his creatures would use the gift of free will for their own injury, did not either abstain from creating them, or in some way safeguard their free will from misuse, or else deny them the gift altogether? St. Thomas replies (C. G., II, xxviii) that God cannot change His mind, since the Divine will is free from the defect of weakness or mutability. Such mutability would, it should be remarked, be a defect in the Divine nature (and therefore impossible), because if God's purpose were made dependent on the foreseen free act of any creature, God would thereby sacrifice His own freedom, and would submit Himself to His creatures, thus abdicating His essential supremacy--a thing which is, of course, utterly inconceivable. Secondly, to the question why God should have chosen to create, when creation was in no way needful for His own perfection, St. Thomas answers that God's object in creating is Himself; He creates in order to manifest his own goodness, power, and wisdom, and is pleased with that reflection or similitude of Himself in which the goodness of creation consists. God's pleasure is the one supremely perfect motive for action, alike in God Himself and in His creatures; not because of any need, or inherent necessity, in the Divine nature (C. G., I, xxviii; II, xxiii), but because God is the source, centre, and object, of all existence. (I, Q. 65:a. 2; cf. Proverbs 26 and Conc. Vat., can. 1:v; Const. Dogm., 1.) This is accordingly the sufficient reason for the existence of the universe, and even for the suffering which moral evil has introduced into it. God has not made the world primarily for man's good, but for His own pleasure; good for man lies in conforming himself to the supreme purpose of creation, and evil in departing from it (C.G., III, xvii, cxliv). It may further be understood from St. Thomas, that in the diversity of metaphysical evil, in which the perfection of the universe as a whole is embodied, God may see a certain similitude of His own threefold unity (cf. I, Q. xii); and again, that by permitting moral evil to exist He has provided a sphere for the manifestation of one aspect of His essential justice (cf. I, Q. lxv, a. 2; and I, Q. xxi, a. 1, 3).
It is obviously impossible to suggest a reason why this universe in particular should have been created rather than another; since we are necessarily incapable of forming an idea of any other universe than this. Similarly, we are unable to imagine why God chose to manifest Himself by the way of creation, instead of, or in addition to, the other ways, whatever they may be, by which He has, or may have, attained the same end. We reach here the utmost limit of speculation; and our inability to conceive the ultimate reason for creation (as distinct from its direct motive) is paralleled, at a much earlier stage of the enquire, by the inability of the non-creationist schools of thought to assign any ultimate cause for the existence of the order of nature. It will be observed that St. Thomas's account of evil is a true Theodicy, taking into consideration as it does every factor of the problem, and leaving unsolved only the mystery of creation, before which all schools of thought are equally helpless. It is as impossible to know, in the fullest sense, why this world was made as to know how it was made; but St. Thomas has at least shown that the acts of the Creator admit of complete logical justification, notwithstanding the mystery in which, for human intelligence, they can never wholly cease to be involved. On Catholic principles, the amelioration of moral evil and its consequent suffering can only take place by means of individual reformation, and not so much through increase of knowledge as through stimulation or re-direction of the will. But since all methods of social improvement that have any value must necessarily represent a nearer approach to conformity with Divine laws, they are welcomed and furthered by the Church, as tending, at least indirectly, to accomplish the purpose for which she exists.
Evil is a privation of being. It does not have metaphysical existence per se (i.e., the evil of blindness is the lack of sight). Moral evil is the failure to act in accord with reason. It's existence is relational and logical, but not metaphysical. At the very least, every being has goodness in its being, absolutely considered. Thus, even the devil has goodness in his being, so evil cannot be "the opposite of God."
How do you know what a perfect being can or cannot do?
We can know through reason that God is pure act, since he is the Prime Mover. He possesses the fullness of being. Evil is privation, in essence. So God cannot be evil.
Similarly, irrationality is a privation of rationality.
Don't confuse irrationality with "super-rationality." God cannot be irrational, but He knows things we cannot know, the "super-rational." The "super-rational" is above reason, but not contradictory to it. Thus, man cannot know the "super-rational" truth of the existence of the Trinity through unaided reason, but man can know this truth if it is revealed to him by God.
This truth is "super-rational," but not irrational, since it can be brought into accord with reason. See the section on The Trinity if you're interested.
I agree that the intention and circumstances surrounding these acts are different. Since they have the same results, to me that makes it relative. Sometimes it's ok to take a life or steal, sometimes it's not. Depends on the situation...and many people see situations differently.
Who were the peacemakers during the reformation or during our civil war?
Because Aquinas wrote something, doesn't make it so. You look at things in the light of Catholic doctrine, I do not. That doesn't mean either of us is right or wrong...it just means we are different.