From Jeremiah Burroughs, The Rare Jewel of Christian Contentment (Banner of Truth, 1964), 217:
[Directions on how to attain contentment] 3. Be sure of your call to every business you go about. Though it is the least business, be sure of your call to it; then whatever you meet with, you may quiet your heart with this: I know I am where God would have me. Nothing in the world will quiet the heart so much as this: when I meet with any cross, I know I am where God would have me, in my place and calling; I am about the work that God has set me. Oh, this will quiet and content you when you meet with trouble. What God calls a man to, in that he may have comfort whatever befalls him. God will look to you, and see you blessed if you are in the work God calls you to.