We cannot live happily by spiritual sustenance alone nor by material prosperity alone. It is only by having ambition and by crowning that ambition with the idea of service to others, either by helping them individually or by working for some great cause, that you will find a spiritual reason for making money for yourself and others. To help others to help themselves also spiritualizes ambition. An Almighty Power has linked us all together. Whenever you help others you are helping yourself.

A "Para-Gram" by Paramahansa Yoganada