“But if it is from God, you will not be able to overthrow them. You may even find yourselves fighting against God!”
Rabbi Gamaliel is a respected, learned Pharisee and member of the High Council. And he gives this little bit of wisdom to the council during a hearing regarding Peter and John. The council had warned them regarding teaching about Jesus, yet they had persisted. Gamaliel points out that this teaching will continue to persist only if it from God - then their little body couldn’t stop it anyhow. He was right. They couldn’t stop it and no amount of persecution has.