Why is it that so many people put God in a box?

People have alot of advice on what God is, what he wants and how he's going to do it. He is GOD for crying out loud. We know from the scriptures what he wants us to know, and we can pray for wisdom, but these so called "experts" on this sight seem to know it all. Our minds and ways are so far away from righteousness and his perfect ways that we can't possible answer for God. Am I right? I think we will all be very suprised who makes it in to heaven on that narrow road and who doesn't. Maybe we should be more careful about giving "God's" advice out.