By practice men can bring even the heart under control, until it will just beat at will, slowly, or quickly, or almost stop. Nearly every part of the body can be brought under control.
There are men who practice Titiksha, and succeed in it. There are men who sleep on the banks of the Ganga in the midsummer sun of India, and in winter float in the waters of the Ganga for a whole day; they do not care. Men sit in the snow of the Himalayas, and do not care to wear any garment. What is heat? What is cold? Let things come and go, what is that to me, I am not the body.
Know that all sins and all evils can be summed up in that one word, weakness. It is weakness that is the motive power in all evil doing; it is weakness that makes men injure others; it is weakness that makes them manifest what they are not in reality. Let them know what they really are.
If the suns come down, and the moons crumble into dust, and systems after systems are hurled into annihilation, what is that to you? Stand as a rock; you are indestructible. You are the Self, the God of the universe. Say - "I am Existence Absolute, Bliss Absolute, Knowledge Absolute, I am He," and like a lion breaking its cage, break your chain and be free forever. What frightens you, what holds you down? Only ignorance and delusion; nothing else can bind you. You are the Pure One, the Ever-blessed.
You are the makers of your own fortunes. You make yourselves suffer, you make good and evil, and it is you who put your hands before your eyes and say it is dark. Take your hands away and see the light.
For a warrior, nothing is higher than a war against evil. The warrior confronted with such a war should be pleased, Arjuna, for it comes as an open gate to heaven. But if you do not participate in this battle against evil, you will incur sin, violating your dharma and your honor.