Descents And Ascents

Hic igitur Filius Dei Dominus noster, exsistens Verbum Patris, et filius hominis: quoniam ex Maria, quae ex hominibus habebat genus, quae et ipsa erat homo, habuit secundum hominem generationem, factus est filius hominis. Propter hoc et ipse Dominus dedit nobis signum in profundum, in altitudinem sursum, quod non postulavit homo, quia nec speravit virginem praegnantem fieri posse, quae erat virgo, et parere filium, et hunc partum Deum esse nobiscum, et descendere in ea quae sunt deorsum terrae, quaerentem ovem quae perierat, quod quidem erat proprium ipsius plasma, et ascendere in altitudinem, offerentem et commendantem Patri eum hominem, qui fuerat inventus. Sanctus Ireneaus Lugdunensis, Adversus Haereses, Lib III, Cap XIX. Migne PG 7.941

He therefore, the Son of God, our Lord, is the Word of the Father and the Son of man, since He had from Mary, she who had descent from men and who was herself a human being, generation according to man and was made the Son of man. According to which the Lord Himself gave us a sign, in the depth and in the height above, 1  which man did not ask for, because he did not expect that a virgin could conceive, or that she who was a virgin could give birth to a son, and that what was thus born should be 'God with us,' descending to those things which are of the earth below, seeking the sheep which had perished, which indeed was His own work, and ascending to the height above, offering and commending to His Father man, who had been found. Saint Ireneaus of Lyon, Against Heresies, Book III, Ch 19.  1 Is 7:14