Thomas Boston, Works, 2:638:
Sinning is more terrible than suffering, in the eyes of the children of God. They pray to be delivered from sin absolutely, at any rate, cost what it will. And they have good reason for it; for there is more evil in the least sin than in the greatest suffering. In sinning we are conformed to the devil, but in suffering to Jesus Christ. Let us then cry earnestly to God, that he may deliver us from evil.
Source: http://www.puritanboard.com/f25/sinning-more-terrible-than-suffering-83465/, Comment #1 (Thank You, Reverend Winzer!)