Sayings from the walls of the ancient Egyptian Luxor Temple:

“Your body is the temple of knowledge.”

“The kingdom of heaven is within you; and whosoever shall know himself shall find it.”

“Know the world in yourself. Never look for yourself in the world, for this would be to project your illusion" 

and from the Bible:

"Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you?” – 1 Corinthians 3:16