Genesis 35:7

7. And he built there an altar. It has been already stated why it behoved the holy fathers, wherever they came, to have an altar of their own, distinct from those of other nations; namely, to make it manifest that they did not worship gods of various kinds, a practice to which the world was then everywhere addicted, but that they had a God peculiar to themselves. For although God is worshipped with the mind, yet an external confession is the inseparable companion of faith. Besides, all acknowledge how very useful it is to us to be stirred up by outward helps to the worship of God. If any one object that these altars differed nothing from other altars in appearance; I answer, that whereas others rashly, and with inconsiderate zeal, built altars to unknown gods, Jacob always adhered to the word of God. And there is no lawful altar but that which is consecrated by the word; nor indeed did the worship of Jacob excel by any other mark than this, that he attempted nothing beyond the command of God. In calling the name of the place “The God of Beth-el,” he is thought to be too familiar; and yet this very title commends the faith of the holy man, and that rightly, since he confines himself within the divinely prescribed bounds. The Papists act foolishly in affecting the praise of humility by a modesty which is most degrading. But the humility of faith is praiseworthy, seeing it does not desire to know more than God permits. And as when God descends to us, he, in a certain sense, abases himself, and stammers with us, so he allows us to stammer with him. And this is to be truly wise, when we embrace God in the manner in which he accommodates himself to our capacity. For in this way, Jacob does not keenly dispute concerning the essence of God, but renders God familiar to himself by the oracle which he has received. And because he applies his senses to the revelation, this stammering and simplicity (as I have said) is acceptable to God. Now, though at this day, the knowledge of God has shined more clearly, yet since God, in the gospel, takes upon him the character of a nursing father, let us learn to subject our minds to him; only let us remember that he descends to us in order to raise us up to himself. For he does not speak to us in this earthly manner, to keep us at a distance from heaven, but rather by this vehicle, to draw us up thither. Meanwhile this rule must be observed, that since the name of the altar was given by a celestial oracle, the building of it was a proof of faith. For where the living voice of God does not sound, whatever pomps may be introduced will be like shadowy spectres; as in the Papacy nothing can be seen except bladders filled with wind. It may be added that Jacob shows the constant tenor of his faith, from the time that God began to manifest himself to him; because he keeps in view the fact, that the angels had appeared unto him. For since the word is in the plural number, I willingly interpret it of angels; and this is not contrary to the former doctrine; for although the majesty of God was then conspicuous, so far as he could comprehend it, yet Moses does not without reason mention the angels whom Jacob saw ascending and descending on the steps of the ladder. For he then beheld the glory of God in the angels, as we see the splendor of the sun flowing to us through his rays.