'It is the Lord' in the Bible

Then that disciple (John) whom Jesus loved (esteemed) said to Peter, “It is the Lord!” So when Simon Peter heard that it was the Lord, he put on his outer tunic (for he was stripped for work) and threw himself into the sea [and swam ashore].

I am aware of nothing against myself and I feel blameless, but I am not by this acquitted [before God]. It is the Lord who judges me.