The ancient Jews believed that the highest heaven, or “heaven of heavens,” and the home of God and his chosen angels was the seventh heaven.
The Muslims agreed that the seventh heaven was the pinnacle of ecstasy.
“Cloud nine” was coined by the U.S. weather bureau and means “as high as clouds can get,” or between thirty and forty thousand feet.
Its meaning as a euphoric state came about in the 1950s.
Happiness is sometimes referred to as “seventh heaven” or “cloud nine”.