From The Imitation of Christ by Thomas a' Kempis:

"When a man reaches a point where he seeks no solace from any creature, then he begins to relish God perfectly. Then also he will be content no matter what may happen to him. He will neither rejoice over great things nor grieve over small ones, but will place himself entirely and confidently in the hands of God, Who for him is all in all, to Whom nothing ever perishes or dies, for Whom all things live, and Whom they serve as He desires."