God exists, as this discussion of morality would be impossible without a spiritual dimension endowed in man, in order for him to even comprehend the concept.
Therefore, since morality is from God, and by definition it enacts the obligation in man to do good. So, as long as one keeps these principles in mind, he is then compelled and enabled to do good.
In other words, there is no such concept or significance to morality if God does not exist.
Theism always leads to morality, provided that one keeps the theism in mind at all times.