Pray gently and calmly, sing with understanding and rhythm; then you will soar like a young eagle high in the heavens. Psalmody calms the passions and curbs the uncontrolled impulses in the body; and prayer enables the [nous] to activate its own energy.
Unless a man is assisted by inner work according to the will of God, he labours in vain at what is external.
Much labour and time is needed in prayer, in order painfully to achieve a state of mind free from all disturbance — that new heaven of the heart in which Christ dwells, as the Apostle says: ‘Know ye not your own selves, how that Jesus Christ dwells in you?’ (2 Cor. 13:5)