Thomas Aquinas

"The greatest use of a life is to spend it on something that will outlast it."

"Music is the most divine of the arts."

"The virtue of courage is the mean between cowardice and recklessness."

"Memory without understanding is not true knowledge."

"The proper good for man is living according to reason."

"To act against one's conscience is to sin."

"The unity of the multitude must be preserved through leadership."

"Charity begins by loving God and extends to loving our neighbor."

"The human mind is capable of understanding all things through reason."

"Peace is the fruit of order and justice."

"Every good that man possesses comes from God."

"The perfection of human nature lies in the development of the virtues."

"A small truth is better than a great falsehood."

"The contemplative life is superior to the active life in itself."

"The state exists for the common good of its citizens."

"To understand is to know the cause."

"Happiness is the ultimate end toward which all human actions are directed."

"The highest level of the active life consists in the contemplation of truth."

"To one who has faith, no explanation is necessary. To one without faith, no explanation is possible."

"Art imitates nature as much as it can, but it is always deficient in some respect."

"The natural law is the participation of eternal law in rational creatures."

"Diligence is the mother of good fortune."

"There is nothing in the intellect that was not first in the senses."

"The soul is in the body as light in the air."

"Those who apply themselves to reading the books of the pagan philosophers in order to acquire knowledge will learn much that is useful."

"Every agent acts for an end, which is its good."

"Wonder is the desire to know the causes of things."

"The study of philosophy is not that we may know what men have thought, but what the truth of things is."

"Common good is more important than any individual good."

"Virtue is nothing more nor less than acting according to reason."