The gospel preached by Paul is not the same gospel preached by Christ. You have two choices. The popular choice is a wide gate and broad way, where you are saved by God’s grace through faith and nothing is required of you but leads to death, which is the gospel of grace by Paul the Pharisee. The unpopular choice is a narrow gate and difficult path where you had to deny yourself to live holy and righteous that leads to life, which is the gospel of the kingdom of God preached by Jesus Christ. The choice is up to you. Repent, and believe in the gospel of Jesus Christ, not Paul.