Chapter 76 of the Tao Te Ching

A man is born gentle and weak.
At his death he is hard and stiff.
Green plants are tender and filled with sap.
At their death they are withered and dry.

Therefore the stiff and unbending is the disciple of death.
The gentle and yielding is the disciple of life.

Thus an army without flexibility never wins a battle.
A tree that is unbending is easily broken.

The hard and strong will fall.
The soft and weak will overcome.

Lao Tzu, Chapter 76 of the Tao Te Ching

(translation by Gia-fu Feng and Jane English)

When we hate our enemies…

“When we hate our enemies, we are giving them power over us: power over our sleep, our appetites, our blood pressure, our health, and our happiness. Our enemies would dance with joy if only they knew how they were worrying us, lacerating us, and getting even with us! Our hate is not hurting them at all, but our hate is turning our own days and nights into a hellish turmoil.”

Dale Carnegie