“Why sleep ye? rise and pray, lest ye enter into temptation.” Luke 22:46
When is the Christian most liable to sleep? Is it not when his temporal circumstances are prosperous? Have you not found it so? When you had daily troubles to take to the throne of grace, were you not more wakeful than you are now? Easy roads make sleepy travellers. Another dangerous time is when all goes pleasantly in spiritual matters. …
Old Erskine wisely remarked, “I like a roaring devil better than a sleeping devil.” There is no temptation half so dangerous as not being tempted. The distressed soul does not sleep; it is after we enter into peaceful confidence and full assurance that we are in danger of slumbering. The disciples fell asleep after they had seen Jesus transfigured on the mountain top. Take heed, joyous Christian, good frames are near neighbours to temptations: be as happy as you will, only be watchful.
— Charles H. Spurgeon, Morning and Evening, October 23, Evening