The mistake is that we cling to the body when it is the spirit that is really immortal. - Swami Vivekananda

Krishna preached in the midst of the battlefield.

"I am the thread that runs through all these pearls," and each pearl is a religion or even a sect thereof. Such are the different pearls, and God is the thread that runs through all of them; most people, however, are entirely unconscious of it.

This is a great fact: strength is life; weakness is death. Strength is felicity, life eternal, immortal; weakness is constant strain and misery, weakness is death.