"Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God. And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus. Finally, brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable - if anything is excellent or praiseworthy - think about such things. Whatever you have learned or received or heard from me, or seen in me - put it into practice. And the God of peace will be with you."
Philippians 4:6-9
It starts and ends with my choice.
I'm told not to worry. I have a choice.
I'm told to worship, petition, and give thanks instead. I have a choice.
I'm promised if I obey, "He will guard my heart and mind with His peace".
I'm told to think about truth, excellence, right, pure, lovely, admirable, praiseworthy things. I have a choice.
I'm told to put these things into practice. I have a choice.
I'm promised if I occupy my mind with these things, "He will be with me".
The choice is simply mine to make.