The secret things belong to the LORD our God, but the things revealed belong to us and to our children forever, that we may follow all the words of this law. –
-Deuteronomy 29:29 (NIV)

There are certainly mysteries to this life, but the Scripture gives us everything that we need to follow after God, even though there are things about God that we will never grasp. He has revealed Himself fully in the Bible. His promises belong to us forever, and they empower us to do all that He has decreed.
http://www.thedailybibleverse.org/