The Ark of the Covenant was the point of contact between heaven and earth - the place where God's presence dwelt. David arranged to have it brought back to Jerusalem, but there are tragic consequences when he underestimates the reverence associated with the task.
God's power is truly extraordinary, and we need to have a healthy reverence for Him, but because of Jesus, we don't have to be afraid. His power is no longer concentrated in a specific place or object. It resides in all believers and it's our responsibility to share it!