Origen

“ For should any one enquire carefully at what time those are to know the Father to whom He who knows the Father reveals Him, and should he consider how a man now sees only through a glass and in a riddle, never having learned to know as he ought to know, he would be justified in saying that no one, no apostle even, and no prophet had known the Father, but when he became one with Him as a son and a father are one. ”

“ For if we speak of a beginning in the case of a transition, and of a way and its length, and if we are told that the beginning of a good way is to do justice, then it concerns us to know in what manner every good way has for its beginning to do justice, and how after such beginning it arrives at contemplation, and in what manner it thus arrives at contemplation. ”

“ But the last enemy to be destroyed is death.” For then but one activity will be left for those who have come to God on account of His word which is with Him, that, namely, of knowing God, so that, being found by the knowledge of the Father, they may all be His Son, as now no one but the Son knows the Father. ”