Plato

"The rewards of this life are not always in proportion to the merit of our actions."

"Every virtue is a mean between two extremes."

"The universe is in the mind of God."

"We should venture on the life that is our own."

"The aim of education should be to convert the mind into a living fountain of truth."

"Justice consists in doing one's own business and not being a busybody."

"The lover of wisdom must be a lover of truth above all else."

"Time is the image of eternity."

"True courage is like a kite—a contrary wind raises it higher."

"The measure of a person is what they do with power."

"Ignorance is the root of all misfortune."

"The greatest wealth is a poverty of desires."

"To find yourself, think for yourself."

"Courage is knowing what not to fear."

"The prison-house is the body; the prisoner is the soul."

"Beauty lies not in the face; it lies in harmony and proportion."

"Wonder is the beginning of wisdom."

"The heaviest penalty for declining to rule is to be ruled by someone inferior to yourself."

"Astronomy compels the soul to look upwards and leads us from this world to another."

"The first and greatest victory is to conquer yourself."

"Justice in the life and conduct of the State is possible only as first it resides in the hearts and souls of the citizens."

"Writing will create forgetfulness in the learners' souls."

"The object of education is to teach us to love beauty."

"Arithmetic will have a very great and elevating effect."

"The lover of inquiry must follow his beloved truth wherever it may lead."

"Human behavior flows from three main sources: desire, emotion, and knowledge."

"The secret of change is to focus all of your energy not on fighting the old, but on building the new."

"A good man cannot be harmed either in life or after death."

"Beware the barrenness of a busy life."

"The direction in which education starts a man will determine his future in life."