13 for it is God who works in you to will and to act in order to fulfill his good purpose.

Read Philippians 2:13 Using Other Translations

For it is God which worketh in you both to will and to do of his good pleasure.
for it is God who works in you, both to will and to work for his good pleasure.
For God is working in you, giving you the desire and the power to do what pleases him.