PSALM 4:8 I will both lay me down in peace, and sleep:

I suppose it would be difficult to describe the causes and workings of consumption and decline. The same kind of disease is common among Christians. It is not that many Christians fall into outward sin, and so on, but throughout our Churches we have scores who are in a spiritual consumption--their powers are all feeble and decaying. They have an unusually bright eye--can see other people’s faults exceedingly well--and sometimes they have a flush on their cheeks, which looks very like burning zeal and eminent spiritual life, but it is occasional and superficial. “Vital energy is at a low ebb: they do not work for God like genuinely healthy workmen; they do not run in the race of His commandments like athletic racers, determined to win the prize; the heart does not beat with a throb moving the entire man, as a huge engine sends the throbbings of its force throughout the whole of the machinery; they go slumbering on, in the right road it is true, but loitering in it. They do serve God, but it is by the day, as we say, and not by the piece; they do not labour to bring forth much fruit--they are content with here and there a little shrivelled cluster upon the topmost bough. That is the state of mind I want to describe, and it is produced in ninety-nine out of every hundred of believers by a long course of prosperity and absence of spiritual trouble. (C. H. Spurgeon.)