The Pharisees were one of the four major Jewish groups around first century AD. They were the descendants of an anti-Greek movement, and flourished before the destruction of the Second Temple. Many authors in the Talmud were Pharisees. Depending on how you look at it, the Pharisees were also a political party.
And ONE example of a Pharisee is: PAUL OF TARSUS:
Acts 23:6: Paul said: "My brothers, I am a Pharisee, the son of a Pharisee.
And what did Jesus say about Pharisees?
Matthew 23:15: Jesus said: "Woe to you, teachers of the law and Pharisees, you HYPOCRITES! You travel over land and sea to win a single convert, and when he becomes one, you make him twice as much a son of hell as you are."
Jesus warned the Pharisees and did NOT like them, YET Paul was a Pharisee. What Jesus said Pharisees do in Matthew 23:15, is EXACTLY what Paul did in:
1 Corinthians 9:19-21: Paul said: "Though I am free and belong to no man, I make myself a SLAVE to everyone, to WIN AS MANY AS POSSIBLE."
"To the Jews I became like a Jew, to win the Jews. To those under the law I became like one under the law (though I myself am not under the law), so as to win those under the law."
"To those not having the law I became like one not having the law (though I am not free from God's law but am under Christ's law), so as to win those not having the law."
So, as far as Jesus is concerned, Paul was a HYPOCRITE and Paul proved Jesus's statement in Matthew 23:15 based on what Paul said in 1 Corinthians 9:19-21