The Christian life as a race.  The encouragement of the heroes of faith who have gone before.  Looking to Jesus, considering Him, lest we be weary and fainthearted.

Hebrews 12:1-3

Jesus, Founder and Perfecter of Our Faith
12 Therefore, since we are surrounded by so great a cloud of witnesses, let us also lay aside every weight, and sin which clings so closely, and let us run with endurance the race that is set before us, 2 looking to Jesus, the founder and perfecter of our faith, who for the joy that was set before him endured the cross, despising the shame, and is seated at the right hand of the throne of God.

Do Not Grow Weary
3 Consider him who endured from sinners such hostility against himself, so that you may not grow weary or fainthearted.