In 2 Timothy 4:7 (NKJV), the Apostle Paul writes Timothy, "I have fought the good fight, I have finished the race, I have kept the faith."
Fighting the good fight is a key component of the true Christian faith, and we are continually told in the Bible to persevere in our faith and during our spiritual trials and earthly battles. We must be willing to fight the good fight, just like the Apostle Paul did, and not shirk from it or avoid it, no matter how difficult it may seem to us at the time.
On April 23, 1910, former United States President Theodore Roosevelt echoed a similar theme in a speech that he gave at the Sorbonne in Paris, France.
TR famously declared:
"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat."