It is a universally accepted principle of the spiritual endeavour that one must be prepared to sacrifice everything without reserve in order to reach the Divine through a spiritualised consciousness. If self-development on the mental, vital and physical plane is his aim that is another matter—that life is the life of the ego with the soul kept behind undeveloped or half developed. But for the spiritual seeker the only development he seeks is the development of the psychic and spiritual consciousness and that too, only because it is necessary to reach and to serve the Divine, not for its own sake. Whatever mental, vital, physical development or use of faculties can be made part of the spiritual life and an instrumentation for the Divine can be kept on condition of surrender of them for transformation and restatement on the spiritual basis. But they must not be kept for their own sake or for the sake of the ego or considered as one’s own possession or used for one’s own purpose but only for the sake of the Divine.
[Sri Aurobindo: Letters on Yoga]
