Who said "To understand the world, understand yourself."?

This quote is attributed to Lao Tzu.

To understand the world, understand yourself. - Lao Tzu

"To understand the world, understand yourself."

Lao Tzu

Philosopher Chinese -604–-531

"The Tao that can be told is not the eternal Tao."

"When you realize there is nothing lacking, the whole world belongs to you."

"Do you have the patience to wait till the mud settles and the water is clear?"

"Nature does not hurry, yet everything is accomplished."