From The Works of William Perkins, Vol. 1, "The Combat Between Christ and the Devil Displayed."
Satan's main drift in temptation is to overthrow our faith, whereby we believe every part and parcel of God's Word to be true: see this in his tempting of Eve; first he labors to weaken her faith in the truth of God's threatening, which done, he easily brought her to actual disobedience in eating the forbidden fruit. The same course he holds at this day; first he will seek to nuzzle men into ignorance, that he may keep them in unbelief. If he fails that way, then will he endeavor to plunge their souls into some damnable error and heresy; and by one of these means does he destroy the faith of many; for while a man remains in ignorance he can have no faith; and if he misses of the truth of God, he wants ground for his faith. Now the reason why the devil labors so much against our faith is, because we cannot truly rely upon god's mercy, nor depend upon His providence, nor yield any acceptable obedience to His commandments, unless we believe His Word.