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 should in a miserable prison of limiting material desires. You should desire salvation so that you may give to everyone else. You should desire to drink God’s nectar of bliss to that you may share it with all. That is true charity.