With a rationalist view in mind, do humans choose to be good? Do they choose to be evil? What are the intentions behind an individual person's actions? Humans are the only beings who actually have the ability to make conscious choices with justifiable intentions. The human capacity to be rational and our possession of intellect place purpose behind every decision we make. So with this power to choose between one thing and another it is entirely possible to say that human beings can choose to be good or bad. Freud's theory of psychological egoism also says that we have the ability to make decisions, although our thought process is what ultimately limits us. The id, which we all possess, represents our most primal needs and desires, but we don't necessarily act on what the id tells us to act on. Our ego and super ego help us distinguish between right and wrong. We choose to listen to this part of our mind that tells us that our actions have consequences and that stealing is wrong. You could easily do these things anyway if you wanted to, choosing to ignore them