Satan will come on with new temptations when old ones are too weak. In a calm prepare for a storm. The tempter is restless, impudent, and subtle; he will suit his temptations to your constitutions and inclinations. . . If your knowledge is weak–he will tempt you to error. If your conscience is tender–he will tempt you to scrupulosity and too much preciseness, as to do nothing but hear, pray, and read. If your consciences be wide and large–he will tempt you to carnal security. If you are bold-spirited–he will tempt you to presumption; if timorous, to desperation; if flexible, to inconstancy; if proud and stiff, to gross folly. Therefore still fit for fresh assaults, make one victory a step to another. When you have overcome a temptation, take heed of unbending your bow, and look well to it, that your bow is always bent, and that it remains in strength. When you have overcome one temptation, you must be ready to enter the battle with another.
-Thomas Brooks, Precious Remedies Against Satan’s Devices