Philosophy on self-knowledge

5 passages from 3 thinkers Socrates, Aristotle, Lao Tzu — on self-knowledge.

The unexamined life is not worth living.
An unexamined life is the unconscious life. Examine yourself.
Knowing yourself is the beginning of all wisdom.
Knowing others is intelligence; knowing yourself is true wisdom.
False words are not only evil in themselves, but they infect the soul with evil.

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