I knew now, that it is by loving, and not by being loved, that one can come nearest the soul of another; yea, that, where two love, it is the loving of each other, and not the being loved by each other, that originates and perfects and assures their blessedness. I knew that love gives to him that loveth, power over any soul beloved, even if that soul know him not, bringing him inwardly close to that spirit; a power that cannot be but for good; for in proportion as selfishness intrudes, the love ceases, and the power which springs therefrom dies. Yet all love will, one day, meet with its return. All true love will, one day, behold its own image in the eyes of the beloved, and be humbly glad.

George MacDonald, Phantastes
(of course...my favorite.)