Thucydides

"The cost of wisdom is loneliness."

"All pleasure comes before its pain."

"Those who cannot remember the past are condemned to repeat it."

"The first casualty of war is always truth."

"To hold power is to constantly justify it."

"The greatest discovery is not what lies before us, but what lies within us."

"Fear of dishonor is often more powerful than love of virtue."

"A life lived without purpose is a life half-lived."

"The practice of virtue is more important than the theory of virtue."

"Beauty is the harmony of opposite elements."

"To speak poorly of others is to reveal the poverty of one's own spirit."

"The future is purchased by the present."

"No man is truly free who serves fear."

"The greatest monument to a man is not what he builds, but what he teaches."

"Failure is not the opposite of success; it is a step toward it."

"The authority of the law is not power, but justice."

"Patience is the armor of time."

"To understand all is to forgive all."

"The greatest enemy is not without, but within."

"A moment of gratitude is a moment of grace."

"The art of leadership is knowing what to overlook."

"To live nobly is to live despite nobility."

"The most valuable currency is credibility."

"Adventure is the discovery of one's own capacity."

"The seed of the future lies in the decisions of today."

"Imagination is the passport to possibility."

"To be remembered is to have truly lived."

"The weight of the crown is borne by the mind, not the head."

"A kind word is never wasted."

"The only true prison is the prison of the mind."