Phil 3 says we should rejoice in the Lord, put no confidence in the flesh, and "press on to take hold of that for which Christ took hold of me". Paul says there is nothing that compares to the "greatness of knowing Christ" and the "righteousness that comes from God". Remember that "we are citizens of heaven, where our Lord Jesus Christ lives" and He will one day "take our mortal bodies and change them into glorious bodies like his own". Be encouraged that though we will not reach perfection on earth, we will receive the "heavenly prize" for which God has called us. We can be glad that it's His race and we don't have to run by our own strength. Our confidence is in His promise that we will indeed "win the race".