There are two moral questions which altruism lumps together into one “package-deal”: (1) What are values? (2) Who should be the beneficiary of values? Altruism substitutes the second for the first; it evades the task of defining a code of moral values, thus leaving man, in fact, without moral guidance.“Introduction,” The Virtue of SelfishnessAltruism declares that any action taken for the benefit of others is good, and any action taken for one’s own benefit is evil. Thus the beneficiary of an action is the only criterion of moral value—and so long as that beneficiary is anybody other than oneself, anything goes.
The Bible tells me to love my brother as myself. I think that goes along with what you wrote. I’m not supposed to hate myself and love my brother. I’m supposed to treat my brother as I would treat myself, so yeah, it’s OK to enjoy the good things in life, giving thanks to the Lord for them. I don’t have to starve myself and be miserable doing without so that I can give everything away to those in need. In fact, being a good caretaker of my body and worldly possessions puts me in a position where I can help my brother.