Rabe'a al-Adawiya

Of God’s devotees, Krishna praises as the best the one who desires God alone and above all that is. When Krishna speaks of lawful desire, this I think is his meaning:

“O God, if I worship Thee for fear of Hell, burn me in Hell, and if I worship Thee in hope of Paradise, exclude me from Paradise; but if I worship Thee for Thy own sake, grudge me not Thy everlasting beauty.” 

—Rabe‘a al-Adawiya from Attar’s Memorial of the Saints, abridged and translated by A. J. Arberry as Muslim Saints and Mystics.