"The being content upon some external thing, it is like the warming of a mans clothes by the fire; but being content by the inward disposition of the soul, it is like the warmth that a mans clothes hath from the natural heat of his body: A man that is a healthful body, he puts on his clothes, and perhaps when he puts them on at the first in a cold morning, he feels his clothes cold, but after he hath them on a little while, they are warm; why how came they warm? They came not nigh the fire: No, but it came from the natural heat of his body. Now a sickly man that hath his natural heat decayed, if he put on his clothes cold, they will not be hot in a long time, but he must have them warmed by the fire, and then they will quickly be cold again; So this will difference the Contentments of men. There are some men now that are very gracious, and when an affliction comes upon them, indeed at first it seems to be a little cold, but after it hath been on a while, the very temper of their hearts, being gracious, it makes their afflictions easy, and makes them to be quiet under it, and not to complain of any discontentment. But now you shall have others, that have an affliction upon them, that have not this good temper in their heart, their afflictions are very cold upon them and grievous; and it may be, if you bring them some external arguments, somewhat from without, as the fire that warms the clothes, perhaps they will be quiet for a while: but alas; wanting a gracious disposition within in their own hearts, that warmth will not hold long."
Jeremiah Burroughs. "The Rare Jewel of Christian Contentment." London: Printed by W. Bentley for L. Sadler and R. Beaumont, 1651. Reproduction of the original in the Union Theological Seminary (New York, N.Y.) Library. p.8-9.