Thomas Aquinas

"Faith is the substance of things hoped for."

"A good deed is never lost; it may serve as a bright example for others."

"The more perfect a being is, the more it acts and the less it is acted upon."

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

"Work is man's participation in the work of creation."

"The ultimate end of all human actions is happiness."

"The contemplation of truth is more exalted than the knowledge of truths."

"Courage is not the absence of fear, but the judgment that something else is more important than fear."

"Every human act that does not attain its due end is an act of sin."

"The natural desire of man is for knowledge."

"In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual."

"The greater someone's knowledge increases, the greater his wonder at the mysteries of nature."

"To love is to will the good of the other."

"True law is right reason in accord with nature."

"Fasting is the soul of prayer."

"The human will is stronger than anything in existence when it is grounded in faith."

"The existence of God can be proven by the fact that the world continues."

"Time is the measure of movement between opposites."

"No one can live happily who looks only to himself and turns everything to his own advantage."

"The more a being acts, the more alive it is."

"There is an appetite in the human heart for higher things."

"Understanding is the reward of faith."

"A person's entire perspective can shift when they grasp a single truth fully."

"Creation is the establishment of a new being."

"The perfection of moral virtue is not easily achieved."

"The good of the people must be the chief law."

"One must not speak of the nature of God in the way one speaks of the nature of created things."

"The soul is like an arena upon which the play of free will is enacted."

"Sorrow can be alleviated by good sleep, a bath, and a change of air."

"The essence of virtue is a mean between two extremes."