REST is not a new concept but only a few people know it's importance. Medically speaking we are advised to rest to refill. While I was reading Genesis( the story of creation) I noticed that On the 7th day of creation, God rested. He was not tired, He was simply making a statement.
He was letting us know the importance of rest. Resting enables us to refill and not grow weary.
But beyond physical rest is Spiritual rest. It's resting in the assurance that in Christ you are made complete, whole, perfected and blessed beyond measure.
Knowing this truth, I can boldly say Jesus is my sabbath. In him, I rest (Hebrew 4:9-10)