Plato

"Nothing in the world is permanent except change."

"Every living being seeks after good, and desires to fulfill the purpose which nature has implanted in him."

"The advancement of knowledge is the highest type of happiness."

"To love another person is to see the face of God."

"Courage is a man standing up and admitting he was wrong."

"He who is not a good servant will not be a good master."

"The soul which has become good is virtuous, and the soul which has become vicious is vicious."

"True beauty is found not in the face, but in the soul."

"The highest of all justice is a justice that upholds eternal truth."

"In the end, we will not remember the words of our enemies, but the silence of our friends."

"Art is the imitation of nature."

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

"No evil is honored among men, and that which is evil is held in all dishonor and shame."

"The measure of the strength of a man is the measure of what he can do with his knowledge."

"An institution is the lengthened shadow of one man."

"The price of knowledge is greater than that of gold."

"To find beauty is to find truth."

"Justice will not come to Athens until those who are not injured are as outraged as those who are."

"The most virtuous character is the one which acts always with wisdom."

"All things flow and nothing stays still."

"The measure of success is not what you have, but how you got it."

"He alone is wise who recognizes his own ignorance."

"The body is a temple; we must preserve it with care and reverence."

"Silence is also speech."

"Those who are hardened by poverty are used to surviving against all odds."

"Knowledge becomes evil if the aim be not virtuous."

"The foundation of justice is good faith."

"Being is more than becoming."

"The greatest wealth is the wealth of the soul."

"A man is his own most vicious enemy."