“He loves Thee too little who loves anything together with Thee, which he loves not for Thy sake.”
—St. Augustine, Confessions 

“Nor Thou nor Thy religion dost control,
The amorousness of an harmonious Soul,
But thou would’st have that love Thyself: as Thou
Art jealous, Lord, so I am jealous now,
Thou lov’st not, till from loving more, Thou free
My soul: who ever gives, takes liberty:
O, if Thou car’st not whom I love
Alas, Thou lov’st not me.

Seal then this bill of my Divorce to All,
On whom those fainter beams of love did fall;
Marry those loves, which in youth scattered be
On Fame, Wit, Hopes (false mistresses) to Thee.”
—John Donne, “A Hymn to Christ”