St. Nikodemos the Hagiorite says that Christ in His human nature had three births: the first from the Virgin Mary, the second by baptism, and the third by resurrection.  With reference to these three births, He was called the first-born because, in the first, He is first-born among many brothers; in the second, He was called first-born of the new creation; and in the third, first born of the dead.  If we are attentive, we will discover that forty days after these births, after each of these three happenings of the Lord, there followed an important event. Forty days after His birth, He was brought to the Temple and we have the Feast of the Presentation.  Forty days after His baptism in the Jordan River, He conquered the devil in those three temptations in the desert.  And forty days after His resurrection, He ascended into heaven and offered to His Father the first-fruits of our own nature.

Metropolitan Hierotheos of Nafpaktos