Now there was a man of the Pharisees named Nicodemus, a ruler of the Jews. This man came to Jesus by night and said to him, “Rabbi, we know that you are a teacher come from God, for no one can do these signs that you do unless God is with him.” Jesus answered him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God...” (John 3:1-6)Helping in the burial of Christ was a pretty public confession that Nicodemus was a follower of Jesus. Here we see a leader, a Pharisee, a teacher of Israel giving it all away to follow Christ. Here was a man who lived out Mark 8:36 "For what does it profit a man to gain the whole world and forfeit his soul?" Nothing else matters, only Jesus.
Nicodemus, who had gone to him before, and who was one of them, said to them, “Does our law judge a man without first giving him a hearing and learning what he does?” They replied, “Are you from Galilee too?... (John 7:48-52)
...the Jews had already agreed that if anyone should confess Jesus to be Christ, he was to be put out of the synagogue. (John 9:22b)
Nicodemus also, who earlier had come to Jesus by night, came bringing a mixture of myrrh and aloes, about seventy-five pounds in weight. (John 19:39)
So, as another ex-Pharisee said,
For I decided to know nothing among you except Jesus Christ and him crucified. (1 Cor 2:2)