Or HaChaim on Genesis 28:16/אור החיים על בראשית כ״ח:ט״ז

1 וייקץ יעקב, Jacob awoke, etc. What did Jacob mean by the word אכן in this verse? It appears to mean that something concealed had been revealed to him. Why would he then express surprise at having been unaware of such knowledge, i.e. ואנכי לא ידעתי? Did he have to be aware of everything that is hidden?

2Perhaps we may explain this by referring to Chulin 91 where the words "for the sun had set" are interpreted to mean that Jacob personally experienced an unusually early sunset on that day. This was designed to force him to spend the night at that site. What Jacob meant then was that at the time when the early sunset occurred he had not understood its meaning. He did so now only with the help of the dream he had dreamt.

3When Jacob said: יש השם במקום הזה, that G'd is in this place, he meant that G'd is present at this site all the time, in contrast to other sites. This is why G'd wanted him to spend the night there in order to communicate with him there. Jacob apologised for not having prepared himself for a divine revelation; had he been aware of the significance of that site he would surely have done so. Prophecy requires the recipient to first prepare himself mentally. Perhaps if Jacob had prepared himself to become the recipient of a message from G'd he might have prophesied while awake instead of while dreaming. This may have been what he bemoaned in this verse. Rashi explains simply that Jacob meant that if he had known the holy nature of that site he would not have allowed himself to go to sleep there. If that were the only meaning of Jacob's words we could say to him (Rashi) that Jacob then would not have experienced all the promises G'd made to him during his dream. We therefore need to include what I have just written in order to explain the verse satisfactorily.