Christians who hate the world and refuse to conform to the standards of the world will experience pain. They discipline themselves to remain obedient to Christ. They deny themselves the pleasures of the world. Because of this, they’re hated and persecuted because they refuse to join their persecutors in sin.
“Examine yourselves to see if your faith is genuine. Test yourselves. Surely you know that Jesus Christ is among you; if not, you have failed the test of genuine faith.” (2 Corinthians 13:5)