Matthew Henry Commentary Genesis 28:16-19

"And Jacob awaked out of his sleep, and he said, Surely Jehovah is in this place. And I knew it not. And he was afraid, and said, How dreadful is this place! This is none other than the house of God, and this is the gate of heaven. And Jacob rose up early in the morning, and took the stone that he had put under his head, and set it up for a pillar, and poured oil upon the top of it. And he called the name of that place Beth-el. But the name of the city was Luz at the first." — Genesis 28:16-19 (ASV)

God manifested himself and his favor to Jacob when he was asleep. The Spirit, like the wind, blows when and where it pleases, and God's grace, like the dew, does not wait for the sons of men. Jacob sought to make good use of the visit God had made him.

Wherever we are, in the city or in the desert, in the house or in the field, in the shop or in the street, we may maintain our communion with Heaven, if it is not our own fault. But the more we see of God, the more cause we see for holy trembling before him.