"Individual karma is always the basic one. And firstly, it is formed by the inclinations, thoughts and motives of man—actions are secondary factors. The Buddhists say, "Karma is thought." If it were otherwise, man could not rid himself of his karma. Verily, the individual karma, being fundamental and determinative, can influence the creation as well as the liquidation of all other types of karma. By injuring himself a person injures others. Everything is linked in the Cosmos; everything is intertwined, and nothing can be dismembered from all the rest of karma."
January 1, 1970
https://en.wikiquote.org/wiki/Karma