If that is all Calvinism is, no one would have an argument. The exact same thing can be said about many churches/denominations.
Either/or.
Monergism/synergism.
I used to believe the latter. By the grace of God alone, I've been brought around to the former by the weight of Scriptural evidence.
Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost; Which he shed on us abundantly through Jesus Christ our Saviour; That being justified by his grace, we should be made heirs according to the hope of eternal life." -- Titus 3:4-7 "But after that the kindness and love of God our Saviour toward man appeared,
"Conversion and salvation must, in the very nature of things, be wrought and effected either by ourselves alone, or by ourselves and God together, or solely by God Himself. The Pelagians were for the first. The Arminians are for the second. True believers are for the last, because the last hypothesis, and that only, is built on the strongest evidence of Scripture, reason and experience: it most effectually hides pride from man, and sets the crown of undivided praise upon the head, or rather casts it at the feet, of that glorious Triune God, who worketh all in all. But this is a crown which no sinners ever yet cast before the throne of God who were not first led into the transporting views of His gracious decree to save, freely and of His own will, the people of His eternal love. Exclude, therefore, O Christian, the article of sovereign predestination from thy ministry or from thy faith, and acquit thyself if thou art able from the charge of robbing God." -- Absolute Predestination, by Jerome Zanchius, Chapter 5, III, (3).
"For this reason we must observe at this juncture that the Spirit who applies the work of Christ is himself also a member of the ontological Trinity. He would have to be. Unless he were, the work of salvation would not be the work of God alone. If God was to be maintained in his incommunicable attributes the Spirit of God, not man, had to effect the salvation of man. The only alternative to this would be that man could at some point take the initiative in the matter of his own salvation. This would imply that the salvation wrought by Christ could be frustrated by man. Suppose that none should accept the salvation offered to them. In that case the whole of Christ's work would be in vain and the eternal God would be set at nought by temporal man. Even if we say that in the case of any one individual sinner the question of salvation is in the last analysis dependent upon man rather than upon God, that is, if we say that man can of himself accept or reject the gospel as he pleases, we have made the eternal God dependent upon man. We have then, in effect, denied the incommunicable attributes of God. If we refuse to mix the eternal and the temporal at the point of creation and at the point of the incarnation we must also refuse to mix them at the point of salvation." -- Cornelius Van Til, "Defense of the Faith"
"...even to morrow the LORD will shew who are His, and who is holy; and will cause him to come near unto him: even him whom he hath chosen will he cause to come near unto him." -- Numbers 16:5
Calvinism simply means that God is in charge of all of it from beginning to end. Christ, the "author and finisher of our faith."
The doctrine of justification by faith alone was debated during the Reformation on the deeper level of monergistic regeneration. This technical term must be explained. Monergism is derived from a combination of a prefix and a root. The prefix mono is used frequently in English to indicate that which is single or alone. The root comes from the verb to work. The erg of monergy comes into our language to indicate a unit of work or energy. When we put the prefix and root together, we get monergy or monergism. Monergism is something that operates by itself or works alone as the sole active party. Monergism is the opposite of synergism. Synergism shares a common root with monergism, but it has a different prefix. The prefix syn comes from a Greek word meaning with. Synergism is a cooperative venture, a working together of two or more parties. When the term monergism is linked with the word regeneration, the phrase describes an action by which God the Holy Spirit works on a human being without this persons assistance or cooperation. This grace of regeneration may be called operative grace. Cooperative grace, on the other hand, is grace that God offers to sinners and that they may accept or reject, depending on the sinners disposition. Monergistic regeneration is exclusively a divine act. Man does not have the creative power God has. To quicken a person who is spiritually dead is something only God can do. A corpse cannot revive itself. It cannot even assist in the effort. It can only respond after receiving new life. Not only can it respond then, it most certainly will respond. In regeneration the soul of man is utterly passive until it has been made alive. It offers no help in reviving itself, though once revived it is empowered to act and respond. Here we reach the ultimate point of separation between semi-Pelagianism and Augustinianism, between Arminianism and Calvinism, between Rome and the Reformation. Here we discover whether we are utterly dependent on grace for our salvation or if, while still in the flesh, still in bondage to sin, and still dead in sin, we can cooperate with grace in such a way that affects our eternal destiny. Arminianism reverses the order of salvation. It has faith preceding regeneration. The sinner, who is dead in sin and in bondage to sin, must somehow shed his chains, revive his spiritual vitality, and exercise faith so that he or she may be born again. In a very real sense regeneration is not so much a gift in this schema as it is a reward for responding to the offer of grace. The Arminian argues that in this universal prevenient grace is primary, in that God first offers grace for regeneration. God takes the initiative. He makes the first move and takes the first step. But this step is not decisive. This step may be thwarted by the sinner. If the sinner refuses to cooperate with or assent to this proffered grace, then grace is to no avail." -- [excerpts from R. C. Sproul - "What is Reformed?" Theology?]Monergism v. Synergism by R. C. Sproul
It's the weekend. Spend some time reading from MONERGISM.COM. It's time well-spent.