Perfection is understood, correlatively, as the fullest possible development and expression of the creature's dispositions and capacities, in accordance with the intelligible causal powers and inclinations.
According to Aquinas, actuality is the fundamental characteristic of any kind of existence, which implies that every actually existing thing is in act and can be said to be perfect insofar as it is fully in act.
Aquinas's moral theology incorporates both a general theory of virtue, and extensive consideration of the ideals and precepts proper to particular virtues. The concept of virtue has a central role in Aquinas's thought.
