There are souls which, crab-like, crawl continually toward darkness, going back in life rather than advancing in it, using what experience they have to increase their deformity, growing worse without ceasing, and becoming steeped more and more thoroughly in an intensifying wickedness.
The Bhagavad-Gita calls on humanity to dedicate body, mind and soul to pure duty and not to become mental voluptuaries at the mercy of random desires and undisciplined impulses.
Ahimsa is the attribute of the soul, and therefore, to be practiced by everybody in all affairs of life. If it cannot be practiced in all departments, it has no practical value.