Because the law was given through Moses. Grace and truth came to be through Jesus Christ.

And he confessed, and did not deny, and confessed, I am not the Christ.

And they asked him, and said to him, Why therefore do thou immerse if thou are not the Christ nor Elijah nor the prophet?

This man first finds his own brother Simon, and says to him, We have found the Messiah (which is, being interpreted, Christ).

Ye yourselves testify that I said, I am not the Christ, but that I am sent ahead of that man.

The woman says to him, I know that Messiah comes, he who is called Christ. When that man comes he will declare all things to us.

Come, see a man who told me all, as many things as I did. Is not this the Christ?

And they said to the woman, We no longer believe because of thy speaking, for we have heard ourselves, and know that this really is the Savior of the world, the Christ.

And we have believed and know that thou are the Christ, the Son of the living God.

And lo, he speaks in public, and they say nothing to him. Perhaps the rulers really know that this really is the Christ?

However we know this man, where he is from, but when the Christ comes, no man knows where he is from.

But many from the crowd believed in him, and they said, When the Christ comes, will he do more signs than these that this man did?

Others said, This is the Christ. Others said, For does the Christ come out of Galilee?

Has not the scripture said that the Christ comes of the seed of David, and from Bethlehem, the village where David was?

His parents spoke these things because they feared the Jews, for the Jews had agreed already, that if any man confessed him as Christ, he should become excommunicated from the synagogue.

The Jews therefore surrounded him, and said to him, When do thou lift up our soul? If thou are the Christ, tell us plainly.

She says to him, Yes, Lord, I have believed that thou are the Christ, the Son of God who comes into the world.

The multitude answered him, We have heard from the law that the Christ remains into the age. And how can thou say, The Son of man must be lifted up? Who is this Son of man?

And this is eternal life, that they should know thee the only TRUE God, and Jesus Christ whom thou sent.

But these are written, so that ye may believe that Jesus is the Christ, the Son of God, and that believing ye may have life in his name.