The text of Codex Sinaiticus differs in numerous instances from that of the authorized version of the Bible in use during Tischendorf’s time. For example, the resurrection narrative at the end of Mark (16:9–20) is absent from the Codex Sinaiticus. So is the conclusion of the Lord’s Prayer: “For thine is the kingdom and the power and the glory forever. Amen” (Matthew 6:13). The woman caught in adultery from John 8 is omitted in Codex Sinaiticus. According to James Bentley, Tischendorf was not troubled by the omission of the resurrection in Mark because he believed that Matthew was written first and that Mark’s gospel was an abridged version of Matthew’s gospel. If this were true, the absence of resurrection in Mark would not be a problem because it appears in the older Matthean gospel. Modern scholarship generally holds that Mark is in fact the oldest of the Synoptic Gospels, which could cause theological concerns over the omitted resurrection.
One other omission in Codex Sinaiticus with theological implications is the reference to Jesus’ ascension in Luke 24:51. Additionally, Mark 1:1 in the original hand omits reference to Jesus as the Son of God.
