But it requires vigilance…

Faith is always exposed to failure. We often submit to the forces that draw us down to where a small desire seems to outweigh the noblest aspiration. There is the network of the false into which we easily slip. There is the enjoyment of the vile that vitiates the taste for the true. We must not cease to be vigilant, careful and anxious to keep our inner ear open to the holy.—Abraham Joshua Heschel in Moral Grandeur and Spiritual Audacity: Essays, 332