“Therefore, my beloved, as you have always obeyed, so now, not only as in my presence but much more in my absence, work out your own salvation with fear and trembling, for it is God who works in you, both to will and to work for his good pleasure.” (Philippians 2:12-13)
There is beautiful symmetry between the Christian’s obedience to Christ and God’s work in that Christian’s life. God “works in you” while you “work out your own salvation”. That does not mean you in some way earn your right to be saved. Neither does it mean you decide for yourself what is right and what is wrong. No, it means that as a faithful Christian you bring your salvation to a full or complete accomplishment or conclusion as you reverently obey God. You grow to spiritual maturity by being obedient to God. When you do that, God is accomplishing His good pleasure for your life. Allow God to work in you by obeying Him today.