So much of what we do in our daily life is motivated by this deep desire to prove ourselves. So we work and strive with no end in sight in order to justify ourselves to everyone, including to ourselves. What if all the proving has been finished and all we should labor and strive for is to enter His rest?
The book of Ecclesiastes does a tremendous job of confronting all the things, smaller than Jesus, that we tend to tether our souls to. It also spoils the outcome of that endeavor, it's like striving after the wind. Ultimately, Jesus alone is our hope and the anchor of our souls.