Para-Gram by Parmahansa Yogananda

Charity is born of sympathy. By sympathy, a quality of Omnipresence, a person may transfer his consciousness to that within suffering men; and experience, as his own, their griefs and limitations. It is then that the charitable desire to offer help springs forth. Selfishness cramps the omnipresent soul in a miserable prison of limiting material desires. You should desire salvation so that you may give it to everyone else. You should desire to drink God's nectar of bliss so that you may share it with all. That is true charity.