"...since no living image of God can exist without the word, whenever God has appeared to his servants, he has also spoken to them. Wherefore, in all outward signs, let us be ever attentive to his voice, if we would not be deluded by the wiles of Satan. But if those visions, in which the majesty of God shines, require to be animated by the word, then they who obtrude signs, invented at the will of men, upon the Church, exhibit nothing else than the empty pomps of a profane theatre. Just as in the Papacy, those things which are called sacraments, are lifeless phantoms which draw away deluded souls from the true God. Let this mutual connexion, then, be observed, that the vision which gives greater dignity to the word, precedes it; and that the word follows immediately, as if it were the soul of the vision."
John Calvin, Commentary upon the Book of Genesis, p. 388 (on verse 46:2)