Why and What Did Jesus Write in the Dust?

 Jesus bent down and wrote with his finger on the ground.
(John 8:6)

This is the only passage where Jesus is said to write. Nothing is said about what He wrote.

“The cross of Christ is the great leveler of human beings, not only because it shows that we are all desperate sinners, and not just because it can only be received by faith, but also because it is such a full and effective ransom for the elect that no child of God dare ever think that we made any contribution to the purchase.”

Justification is what a judge does in a courtroom. It is a declaration that a defendant is found innocent. And the declaration is made because the judge (or jury) presumes there is real innocence—real righteousness. So for an infallible judge, there are no mistakes. No innocent people are punished. And no guilty go free. In the courtroom of an infallible judge, the only time there is justification is when there is real innocence—real righteousness. The defendant is declared to be just, because he is found to be just. 

Bloodlines Book by John Piper
(pages 139,143)

"When he saw the crowds, he had compassion for them, because they were harassed and helpless, like sheep without a shepherd." (Matthew 9:36)

"And when the centurion, who stood facing him, saw that in this way he breathed his last, he said, “Truly this man was the Son of God!”
 There were also women looking on from a distance, among whom were Mary Magdalene, and Mary the mother of James the younger and of Joses, and Salome. (Mark 15: 39-40)