Thomas Aquinas

"The greatest thing the world has ever seen is holiness."

"Prudence is the knowledge of what to do and what to avoid."

"The fear of the Lord is the beginning of wisdom."

"To lie is to act against nature itself."

"Nothing can be better than that which is eternal and unchangeable."

"The human soul yearns for that which is infinite."

"All men naturally desire to know."

"The perfection of the soul consists in virtue."

"Every effect must have a cause, and that cause itself must have been caused."

"Understanding is the reward of faith."

"The soul is the form of the body."

"A thing is good in the measure that it achieves its proper end."

"Time is the measure of movement and change."

"The universe requires a Prime Mover, which we call God."

"The greater the understanding, the greater the capacity for love."

"Virtue is a habit of choosing rightly."

"Human beings are rational animals."

"The intellect perceives eternal truths."

"To doubt everything and to believe everything are two equally convenient solutions; both dispense with the necessity of reflection."

"The mind is like a vessel: the larger it is, the more it contains."

"A thing becomes precious when it is rightly understood."

"The good is that which all things desire."

"Being is the proper subject of metaphysical inquiry."

"The one who is without sin may cast the first stone."

"Contemplation is the highest activity of the soul."

"Nothing comes from nothing; something always comes from something."

"The virtuous man acts in accordance with right reason."

"To have a friend is to have one soul in two bodies."

"The perfect human act is one that flows from both understanding and will."

"Charity is the greatest of all virtues."