Prayer is the life of the soul.
Madame de Stael thought it was pride in mankind to endeavour to penetrate the secret of the universe; and speaking of the higher metaphysics she said: "I prefer the Lord's Prayer to it all."
Prayer is more than meditation. In meditation the source of strength is one's self. When one prays he goes to a source of strength greater than his own.
I desire no other proof of Christianity than the Lord's Prayer.