It is communion with God. Now, there can scarcely be communion between a king and a rebel. In ourselves we have no right to pray. Anyone can do this, and that is a petition which is never unanswered, and one, if sincere, to which the answer is never delayed. But that is not prayer in the Bible sense.
Prayer is the privilege of a child.
Children of God alone can claim from the heavenly Father the things which He hath prepared for them that love Him. Nay, surely it is natural. But do not misunderstand me. This does not shut any man out of the kingdom of heaven. Turn your face to God.