Beware of Satan's devices

Remember how much needless trouble your vain fears have bought upon you formerly: "And hast feared continually because of the oppressor, as if he were ready to devour; and where is the fury of the oppressor?" He seemed ready to devour, yet you are not devoured. I have not bought upon you the thing that you feared; you have wasted your spirit, disordered your soul, and weakened your heads to no purpose: you might have all this while you enjoyed your peace, and possessed your soul in patience. And here, I cannot but observe a very deep policy of Satan in managing a design against the soul by these vain fears. I call them vain in reference to the frustration of them by Providence; but certainly they are not as vain as the end in which Satan aims by raising them; for herein he acts as soldiers do in the siege of a garrison, who to wear out the besieged by constant watchings, and thereby unfit them to make resistance when they storm it in earnest, every night rouse them with false alarms, which though they come to nothing yet remarkably answer the ultimate design of the enemy. Oh, when will you beware of Satan's devices? [John Flavel]