“We should so reason that the splendor of the divine countenance, which even the apostle calls ‘unapproachable’ [1 Tim. 6.16], is for us like an inexplicable labyrinth unless we are conducted into it by the thread of the Word; so that it is better to limp along this path than to dash with all speed outside of it.”

John Calvin, Institutes of the Christian Religion, I, 7, 3.