We ought to pray, not according to any bodily habit nor with a habit of loud noise nor out of a custom of silence or on bended knees. But we ought soberly to have an attentive mind, waiting expectantly on God until He comes and visits the soul by means of all of its openings and its paths and senses. And so we should be silent when we ought, and to pray with a cry, just as long as the mind is concentrated on God. For as when the body does any task, it is completely occupied with the word and all its members help one another, so also the soul should be totally concentrated on asking and on a loving movement toward the Lord, not wandering and dispersed by its thoughts but with concentration waiting expectantly for Christ.
And thus He will enlighten, teaching on how to ask, giving pure prayer that is spiritual and worthy of God and bestowing the gift of worship “in spirit and in truth” (Jn 4:24).
Except taken from the book: Pseudo-Macarius: the fifty spiritual homilies and the great letter.