Shrimad Bhagavad Gita As It Is -Shri Shrimad A.C Bhaktivedanta Swami Prabhupada
Karma-yoga—Action in krsna Consciousness
Chapter 5: Verse-11
käyena manasä buddhyä
The yogis, abandoning attachment, act with body, mind, intelligence and even with the senses, only for the purpose of purification.
When one acts in krsna consciousness for the satisfaction of the senses of Krsna, any action, whether of the body, mind, intelligence or even the senses, is purified of material contamination. There are no material reactions resulting from the activities of a krsna conscious person. Therefore purified activities, which are generally called sad-äcära, can be easily performed by acting in krsna consciousness. Sri Rüpa Gosvämi in his Bhakti-rasämrta-sindhu  describes this as follows:
ihä yasya harer däsye
“A person acting in krsna consciousness (or, in other words, in the service of Krsna) with his body, mind, intelligence and words is a liberated person even within the material world, although he may be engaged in many so-called material activities.” He has no false ego, for he does not believe that he is this material body, or that he possesses the body. He knows that he is not this body and that this body does not belong to him. He himself belongs to Krsna, and the body too belongs to Krsna. When he applies everything produced of the body, mind, intelligence, words, life, wealth, etc.—whatever he may have within his possession—to Krsna’s service, he is at once dovetailed with Krsna. He is one with krsna and is devoid of the false ego that leads one to believe that he is the body, etc. This is the perfect stage of krsna consciousness.
- käyena=with the body; manasä=with the mind; buddhyä=with the intelligence; kevalaih=purified; indriyaih=with the senses; api=even; yoginah=Krsna conscious persons; karma=actions; kurvanti=they perform; sangam=attachment; tyaktvä=giving up; ätma=of the self ;suddhaye=for the purpose of purification.