Thomas Aquinas
Perfection of moral virtue does not wholly take away the passions, but regulates them.
Beware the man of one book.
He who is dying of hunger must be fed rather than taught.
...the goodness of the will depends on the intention of the end.
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.