"The essence of Karma is to know the truth of oneself by inquiring ‘Who am I, the doer, who begins to do Karmas?’ Unless the doer of Karmas, the ego, is annihilated through inquiry, the perfect peace of supreme bliss, which is the result of Karma Yoga, cannot be achieved."
January 1, 1970
https://en.wikiquote.org/wiki/Karma