Though man experiences sleep every day, yet he never realizes it as the greatest blessing of his existence until he suffers from lack of it. Man disregards all natural blessings. Not regarding them as blessings, he remains discontented. A person who can see the blessing there is in life itself, would be so thankful that whatever may be lacking in the outward life would seem insignificant. The inner blessing is so much greater compared with what is lacking in the outer world. There is indeed no comparison between them.