Pre-eminent Catholic priest, scholar, and theologian, Thomas Aquinas and his thoughts on religion, morality, and the human mind:
A man has free choice to the extent that he is rational.
Because of the diverse conditions of humans, it happens that some acts are virtuous to some people, as appropriate and suitable to them, while the same acts are immoral for others, as inappropriate to them.
Wonder is the desire for knowledge.
Because philosophy arises from awe, a philosopher is bound in his way to be a lover of myths and poetic fables. Poets and philosophers are alike in being big with wonder.
Better to illuminate than merely to shine, to deliver to others contemplated truths than merely to contemplate.
Beware of the person of one book.
By nature all men are equal in liberty, but not in other endowments.
Clearly the person who accepts the Church as an infallible guide will believe whatever the Church teaches.
Good and evil:
Good can exist without evil, whereas evil cannot exist without good.
If the highest aim of a captain were to preserve his ship, he would keep it in port forever.
The highest manifestation of life consists in this: that a being governs its own actions. A thing which is always subject to the direction of another is somewhat of a dead thing.