The ordinary life consists in work for personal aim and satisfaction of desire under some mental or moral control, touched sometimes by a mental ideal. The Gita’s yoga consists in the offering of one’s work as a sacrifice to the Divine, the conquest of desire, egoless and desireless action, bhakti for the Divine, an entering into the cosmic consciousness, the sense of unity with all creatures, oneness with the Divine. This yoga adds the bringing down of the supramental Light and Force (its ultimate aim) and the transformation of the nature.
Ref: Letters on Yoga – II