While studying this afternoon I stumbled upon this thought from J.I. Packer:

It is not too much to say that God made us to pray; that prayer is (not the easiest, but) the most natural activity in which in which we ever engage; and that prayer is the measure of a man in God’s sight. ‘What a man is alone on his knees before God,’ said the saintly Murray McCheyne, ‘that he is, and no more.’