Philippians 2:13
“For it is God who works in you to will and to act on behalf of His good purpose.”
Philippians 2:13 assures believers that God Himself works in them — energizing both the desire and the ability to do His will — so that Christian effort rests on God’s prior, empowering grace.
Verse 12 urges believers to “work out your salvation,” and verse 13 gives the reason it is possible: “it is God who works in you, to will and to act on behalf of His good purpose.” God is at work at the deepest level — shaping both our wanting (“to will”) and our doing (“to act”). Our effort is real, but it is God-enabled.
This dissolves the false choice between human responsibility and divine grace. We strive precisely because God is striving in us. The verse both humbles (the credit is God’s) and encourages (we are not left to ourselves): the God who began a good work will bring it to completion (Philippians 1:6).
How can God work in me while I also “work out” my salvation?
The two are not rivals. We act genuinely, but only because God is at work in us empowering the will and the effort. Grace enables obedience rather than replacing it.
What is God’s “good purpose” here?
His purpose to conform believers to Christ and complete the salvation He began (Philippians 1:6), for His glory and their good.