race. race-course. Greek. stadion. Elsewhere translated "furlong", the course being usually of this length.
prize. Greek. brabeion. Only here and Philippians 1:3; Philippians 1:14. Compare the verb, Colossians 3:15. (rule).
So. i.e. as these runners do.
obtain. lay hold of. Greek. katalambano. See Acts 4:13.