“Whenever you are in doubt, or when the self becomes too much with you, apply the following test. Recall the face of the poorest and the weakest man whom you may have seen, and ask yourself if the step you contemplate is going to be of any use to him. Will he gain anything by it? Will it restore him?…Then you will find your doubts and..self melting away.” 

(Mohandas K Gandhi, found in Pyarelal, Last Phase, Volume I, Chapter 3, p.65)