Saints and divines teach us that prayer is the elevation of the soul to God. If thy prayer by word of mouth serves this purpose, well and good. But even so: if my clothing serves me, all the same it is not my own self. Thus does all prayer of the mouth serve true prayer; but in itself and taken alone it is not true prayer.
— Blessed John Tauler, quoted in
The Soul Afire: Revelations of the Mystics
edited by H. A. Reinhold.