Take the old prophets as your mentors. They put up with anything, went through everything, and never once quit, all the time honoring God. What a gift life is to those who stay the course! You’ve heard, of course, of Job’s staying power, and you know how God brought it all together for him at the end. That’s because God cares, cares right down to the last detail. James 5:10-11(MSG)
The athlete’s staying power is undistracted and unwavering focus on the finishing point and prize.
A life complete and established in Christ Himself and His Word is the finishing point and prize of winning our life’s race. So it takes undistracted and unwavering concentration on the Lord and His Word to stay the course, to finish the race. Stay in fellowship with the Lord and His word in all that you do. He’s your strength, your endurance, your sustenance, your stay.