Gita teaches Karma-Yoga. We should work through Yoga (concentration). In such concentration in action (Karma-Yoga), there is no consciousness of the lower ego present. The consciousness that I am doing this and that is never present when one works through Yoga. The Western people do not understand this. They say that if there be no consciousness of ego, if this ego is gone, how then can a man work? But when one works with concentration, losing all consciousness of oneself the work that is done will be infinitely better, and this every one may have experienced in his own life.
We perform many works subconsciously, such as the digestion of food etc., many others consciously, and others again by becoming immersed in Samâdhi as it were, when there is no consciousness of the smaller ego. If the painter, losing the consciousness of his ego, becomes completely immersed in his painting, he will be able to produce masterpieces. The good cook concentrates his whole self on the food-material he handles; he loses all other consciousness for the time being. But they are only able to do perfectly a single work in this way, to which they are habituated. The Gita teaches that all works should be done thus. He who is one with the Lord through Yoga performs all his works by becoming immersed in concentration, and does not seek any personal benefit. Such a performance of work brings only good to the world, no evil can come out of it. Those who work thus never do anything for themselves.
The result of every work is mixed with good and evil. There is no good work that has not a touch of evil in it. Like smoke round the fire, some evil always clings to work. We should engage in such works as bring the largest amount of good and the smallest measure of evil. (V, 247 – 248)