2 “Nicodemus,” however, “one of the Pharisees, who had come to the Lord by night,”— not indeed as being himself unbelieving, but timid; for therefore he came by night to the light, because he wished to be enlightened and feared to be known—Nicodemus, I say, answered the Jews, “Does our law judge a man before it hear him, and know what he does?” For they perversely wished to condemn before they examined. Nicodemus indeed knew, or rather believed, that if only they were willing to give Him a patient hearing, they would perhaps become like those who were sent to take Him, but preferred to believe.
They answered, from the prejudice of their heart, what they had answered to those officers, “Are you also a Galilean?” That is, one seduced as it were by the Galilean. For the Lord was said to be a Galilean, because His parents were from the city of Nazareth. I have said “His parents” in regard to Mary, not as regards the seed of man; for on earth He sought but a mother, He had already a Father on high. For His nativity on both sides was marvellous: divine without mother, human without father. What, then, said those would-be doctors of the law to Nicodemus? “Search the Scriptures, and see that out of Galilee arises no prophet.” Yet the Lord of the prophets arose thence. “They returned,” says the evangelist, “every man to his own house.”
Source: Tractates on the Gospel of John (New Advent)