Even what Luke does say about Christ is ambiguous or even contradictory.[34] For example, according to Luke 2:11 Jesus was the Christ at his birth, but in Acts 10:37–38 he becomes Christ at the resurrection, while in Acts 3:20 it seems his messiahship is active only at the parousia, the "second coming"; similarly, in Luke 2:11 he is the Saviour from birth, but in Acts 5:31 he is made Saviour at the resurrection; and he is born the Son of God in Luke 1:32–35, but becomes the Son of God at the resurrection according to Acts 13:33.[35] Many of these differences may be due to scribal error, but others were deliberate alterations to doctrinally unacceptable passages, or the introduction by scribes of "proofs" for their favourite theological tenets.[36] An important example of such deliberate alterations is found in Luke's account of the baptism of Jesus, where virtually all the earliest witnesses have God saying, "This day I have begotten you."[37] (Luke has taken the words of God from Psalm 2, an ancient royal adoption formula in which the king of Israel was recognised as God's elect).[37] This reading is theologically difficult, as it implies that God is now conferring status on Jesus that he did not previously hold.[37] It is unlikely, therefore, that the more common reading of Luke 3:22 (God says to Jesus, "You are my beloved son, with you I am well pleased") is original.[37]