Origen

“ And if a branch cannot bear fruit except it abide in the vine, it is evident that the disciples also of the Word, who are the rational branches of the Word’s true vine, cannot produce the fruits of virtue unless they abide in the true vine, the Christ of God, who is with us locally here below upon the earth, and who is with those who cleave to Him in all parts of the world, and is also in all places with those who do not know Him. ”