12. The Bhagavad Gita

In the second caste, the Vaisya, man, engaged in agriculture and animal husbandry, will enter into the most intimate relationship with the surrounding nature. He will learn to work the soil with the sweat of his brow, he will sow and reap and thus produce food for his fellow brothers; he will practice all the virtues of a farmer. Then he will become a merchant, engage in trade and industry, accumulate riches and undergo many of the vices of his class. It is only through selfishness and avarice that he will often learn the first wisdom of economics and the proper use of his wealth for the benefit and worship of his fellow citizens. When he has learned his lesson to perfection at this level, he will be born as a Kshatriya in the next incarnation, in the warrior caste. Here he must use his powers to protect and defend his homeland; he must gain strength through courage and bravery and self-denial to be able to face any danger. He can only do this if he is prepared to sacrifice his life to duty at any moment. The warrior must give up his physical life, then his soul acquires the spirit of self-denial and is the creator of an ideal. The body is solely intended to help the development of the inner life; it must disappear when the soul needs a new body, that is, a more suitable garment for its advanced development. War is the school that must be passed through to reach that highest caste of the Brahmins, for whom - at their level of development and knowledge - fighting and killing is a mortal sin. “Kill your enemy” is commanded to the Kshatriya, but he knows that he can never truly kill one of his brothers nor be killed by him, as Krishna says to Arjuna in consolation.