Pythagoras on wisdom and folly.
Aristotle on self-knowledge.
Socrates on the origin of wisdom.
Socrates on the paradox of knowledge.
Plato on the essence of courage.
Plato on the wisdom of silence.
Robert Frost on life's continuity.
Mahatma Gandhi on non-violence.
Albert Einstein on the pursuit of happiness.
John Lennon on the unpredictability of life.
Confucius on the importance of persistence.
Martin Luther King Jr. on the importance of support.
A proverb warning against false appearances.
Albert Einstein comments on the boundless nature of the universe and human folly.
