I Chronicles 19:13 Be of good courage, and let us behave ourselves valiantly for our people, and for the cities of our God: and let the LORD do that which is good in his sight.
The warriors would do the best they could. They would fight with all their might. They would have the right motive and give all that they could. They would work the process, do their part, behave bravely, have good courage but they knew that it would depend on the Lord and what He would do. He would be the final decider. He always is. He will ultimately determine everything but I am to do my part.
So I need to know what my part is, behave valiantly and be of good courage. Fight and trust. The final result will be up to God.