God may let us know of things so that we may be warned. It could be that his intent and even his revelation of that intent (consider the book of Revelation for example), is so that we may be warned. It might also be so that we are prepared. In other words, as we read the prophecies of Scripture (think again of Revelation), those ought to prepare us for the challenges we may face, and remind us of God's justice, holiness, and most of all his love.
I may need that reminder now and again. And I suspect you might too.
