Lao Tzu's birth date is unknown, with scholars placing it between 600 and 400
The Tao Te Ching, purported to contain Lao Tzu's great teachings, is a compilation. Most scholars agree that the sayings were gathered over many years, with some ascribed to Lao Tzu and others to his disciples. The work is a collection of pithy aphorisms or sayings that express the ideas that make up his teachings.
The Tao Te Ching has been referred to as a “wisdom book.” Here is a sampling:
There is nothing better than to know that you don't know.
Not knowing, yet thinking you know —
This is sickness.
Only when you are sick of being sick
Can you be cured.
The sage's not being sick
Is because she is sick of sickness.
Therefore she is not sick.