For it is God who works in you both to will and to do of his good pleasure.
All Commentaries on Philippians 2:13 Go To Philippians 2
John Chrysostom
AD 407
And when he says “with fear and trembling” see how he assuages the pain of it. For what does he say? “It is God who works in you.” “Do not be afraid,” he says, “because I said ‘with fear and trembling.’ I did not say it to make you give up, thinking virtue impossible of attainment, but so that you may carry on, so that you may not collapse.” .