.... The Word recognizes three Births for us; namely, the natural birth,
that of Baptism, and that of the Resurrection. Of these the first is
by night, and is servile, and involves passion; but the second is by
day, and is destructive of passion, cutting off all the veil that is
derived from birth, and leading on to the higher life; and the third
is more terrible and shorter, bringing together in a moment all
mankind, to stand before its Creator, and to give an account of its
service and conversation here; whether it has followed the flesh, or
whether it has mounted up with the spirit, and worshiped the grace of
its new creation. My Lord Jesus Christ has showed that He honoured all
these births in His own Person; the first, by that first and
quickening Inbreathing;  the second by His Incarnation
and the Baptism wherewith He Himself was baptized; and the third by
the Resurrection of which He was the Firstfruits; condescending, as He
became the Firstborn among many brethren, so also to
become the Firstborn from the dead.... 

- St Gregory Nazianzus