This was done so the Ark of the Covenant could be moved as the Children of Israel went through the wilderness.
What does this teach us?
This lets us know our God is a Movement, not a Monument. He is ever moving, ever flowing, always with us, no matter where we go. It was David who said, "Where can I go from your Spirit? Where can I flee from your presence? If I go up to the heavens, you are there; if I make my bed in the depths, you are there." Psalm 139:7-9. Our God is ever present, ever going and all encompassing to fulfill our every need!
However He wants you and I to take Him with us wherever we go.
The Psalmist taught us, "I have hidden thy Word in my heart so I will not sin against You" Psalm 119:11. Take time today, even if it's just one verse, and begin to hide His Word in your heart. Make it part of your fiber so you live it out. Then you too, will pick up the staves, so you can take our moving God with you!