'Call to me and I will answer you. I'll tell you marvelous and wondrous things that you could never figure out on your own.'
I love this verse for two reasons:
Firstly - the assurance that GOD will answer us. As Christians we often find it hard to believe that GOD will answer our every call - especially when we haven't quite lived up to our end of the 'bargain'. It's this mindset that limits what GOD is able to do through us because we live with a 'law' mindset. In the Old Testament you had to pay a price in order to have your transgressions absolved and be able to plead with GOD.
Jesus' death and resurrection changed all of that - so why, then, do we still think in the same way? I believe that it's because we listen to the Devil when he tells us that we're not good enough. It takes very little for us to believe that GOD won't take note of our call because we don't deserve His attention.