Paul’s words in Philippians 2:12-13 capture my attention:
Therefore, my dear friends, as you have always obeyed – not only in my presence, but now much more in my absence – continue to work out your salvation with fear and trembling, for it is God who works in you to will and to act in order to fulfill His good pleasure.
These two short verses provide what I see as the best description of the mysterious tension that exists in our lives between God’s power and our effort.