I recently took an 8,000 mile trip, which took 13 hours on a 747. I experienced jet lag that interrupted my ability to rest as normal. I am now back to normal and am resting fine. Rest is a tremendous blessing. We are designed to rest at certain intervals. The book of Hebrews describes a spiritual rest that the people of God may enter into, and it is not talking about merely being born again, nor is it talking about dying and going to heaven. It is talking about resting our faith totally in God, through our faith in Christ, and experiencing the sweet joy of the fullness of the Spirit of God. What a rest! What a blessing!