Prophets, they know

Take a look at this verse below and tell me what you think it mean.

Jacob 1

5For because of faith and great anxiety, it truly had been made manifest unto us concerning our people, what things should ^ahappen unto them.

Ok so lets think about this.  There is a lot summed up here that Jacob explains to us.  If you read 1 Nephi 11-14 you would understand that Nephi was shown a lot concerning what the future held for his people.  But he doesn't tell us all he knows.  That's why this verse is so important, because Jacob tells us here that the prophet isn't joking around when he tells us of future events, because he really knows what will happen, but he can't tell us everything, he's not a fortune teller.  And often times in the scriptures and in recent years the prophet hasn't recorded much if not any of what he's been shown.  So when you hear things like, "Get out of debt," "be sure you have a year supply of food storage," and other examples, take it for a fact that there is a reason he's saying those things.