John Calvin Commentary John 11:27

"She saith unto him, Yea, Lord: I have believed that thou art the Christ, the Son of God, [even] he that cometh into the world." — John 11:27 (ASV)

Yes, Lord. To prove that she believes what she had heard Christ say about himself—that he is the resurrection and the life—Martha replies that she believes that he is the Christ, and the Son of God. This knowledge indeed includes the sum of all blessings, for we ought always to remember for what purpose the Messiah was promised and what duty the prophets ascribe to him.

Now when Martha confesses that it was he who was to come into the world, she strengthens her faith by the predictions of the prophets. Hence it follows that we ought to expect from him the full restoration of all things and perfect happiness; and, in short, that he was sent to erect and prepare the true and perfect state of the kingdom of God.