Tao Te Ching – Lao Tzu – Chapter 33
Knowing others is intelligent
Knowing yourself is wise
Controlling others is strong
Controlling yourself is powerful
Contentedness is rich
Perseverance is determination
Integrity lasts long
Spiritual legacy begets immortality
Lao Tzu makes it clear that the “inner-self ” is much more important than the outside factors.
He who understands other people is merely intelligent; he who understands himself is genuinely enlightened.
He who overcomes other people has external strength; he who overcomes himself possesses inner power. External strength never lasts. Inner power resides within and lasts forever so it makes you more powerful.
Furthermore, he mentions the significance of contentment, perseverance, and keeping your integrity (knowing your position).
The last and not the least that keep you self-searching instead of finding outer material, and help you not to perish but to be eternally present.