Purify the chamber of your heart. Regardless of where you are, there pray, for he who dwells within–in that secret place which the psalmist calls the bosom–hears you..Our Lord God is here, the Word of God, the Word made flesh, the Son of the Father, the Son of God, the Son of Man; the lofty One who makes us, the humble one who makes us anew, walking among men, bearing the human, concealing the divine.

St Augustine of Hippo,

from St. Augustine Answers 101 Questions on Prayer