Book 1, Chapter 24 : Proportion

You can’t keep standing on tiptoe
or walk in leaps and bounds.
You can’t shine by showing off
or get ahead by pushing.
Self-satisfied people do no good,
self-promoters never grow up.

Such stuff is to the Tao
as garbage is to food
or a tumor to the body,
hateful.
The follower of the Way
avoids it.