Heb 12:1-2
"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, looking to Jesus, the founder and perfecter of our faith."
The stadium metaphor: the heroes of chapter 11 are the 'cloud of witnesses' (nephos martyron) in the stands. The race requires: (1) laying aside the weight (ogkon); (2) laying aside the sin that entangles; (3) endurance (hypomone); (4) looking to Jesus. Jesus is the archegos (pioneer) and teleiotes (perfecter) of faith.