Change from within.
If Paul has one thing very clear, we can see it in this text: the most important thing for him wasn't success, fame, or even a super-comfortable life. What Paul most desired was to truly know Christ. But he didn't want to know Him merely by hearsay; he wanted to live Him, even if it meant suffering or losing things in this life.
Do you know why Paul thought this? Because he understood the true value of Jesus Christ's sacrifice and resurrection. This sacrifice wasn't something that happened at a moment in history and ended there. That sacrifice has allowed us to achieve much more than we ask for or understand. That sacrifice is what allows for transformation in our lives: healing when we are broken, victory when we face a struggle, and finding meaning when there is none.
Sharing in the suffering of Jesus Christ does not mean masochism; it means an act of surrender and love for the One who has saved us once and for all. Let us not seek only the miracles of Jesus Christ, let us seek to be like Him in every way. God does not want us to have a simple religion; He desires us to have a living and deep relationship with Jesus Christ, a relationship that transforms us from within.
10 that I may know Him and the power of His resurrection and the fellowship of His sufferings, being made conformable to His death, 11 if perhaps I may attain to the resurrection from the dead.
Philippians 3:10-11