David Lindberg

“Knowing others is intelligence;
knowing yourself is true wisdom.
Mastering others is strength;
mastering yourself is true power.”
― Lao Tzu, Tao Te Ching

“The fool doth think he is wise, but the wise man knows himself to be a fool.”
― William Shakespeare, As You Like It

“By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest.”
― Confucious

“The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”
― Albert Einstein