The apostle Paul speaks of both our free will and God’s sovereignty in the below verses. He tells the Philippians to both work out their salvation as if they were fully capable on their own and that God is at work in us as that God is fully responsible on His own. Both our free will and God’s sovereignty are spoken of even though they are pretty much complete opposites. We are not to work for our salvation but to work it out in practice in our lives. Because God is at work in us and His grace is available we are able to achieve the purposes for which God saved us.
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 God is at work in you both to will and to work for His good pleasure.
Be blessed in Him and walk in His strength!!
Therefore Go! (and make disciples of all nations)