c. 198–203 · Clement of Alexandria, The Stromata, or Miscellanies 7.7
Prayer is, then, to speak more boldly, converse with God. Though whispering, consequently, and not opening the lips, we speak in silence, yet we cry inwardly. For God hears continually all the inward converse. So also we raise the head and lift the hands to heaven, and set the feet in motion at the closing utterance of the prayer, following the eagerness of the spirit directed towards the intellectual essence; and endeavouring to abstract the body from the earth, along with the discourse, raising the soul aloft, winged with longing for better things, we compel it to advance to the region of holiness, magnanimously despising the chain of the flesh. For we know right well, that the Gnostic willingly passes over the whole world, as the Jews certainly did over Egypt, showing clearly, above all, that he will be as near as possible to God. Now, if some assign definite hours for prayer—as, for example, the third, and sixth, and ninth—yet the Gnostic prays throughout his whole life, endeavouring by prayer to have fellowship with God. And, briefly, having reached to this, he leaves behind him all that is of no service, as having now received the perfection of the man that acts by love.