God And The Human Heart
There is nothing in the world that will ever satisfy the human heart, except God. You were not made for the things of this world (as good as they may be). Your life was created for the sheer purpose of being filled with His love, both in this life and the next.
The call to re-focus our lives each day on Christ is the call we must tend to. It's not even close to easy, and we'll get distracted along the way. What's important is that, everyday, we do what we can to turn our hearts back to Him.