12:1 huge crowd of witnesses: The host of faithful followers of God (ch 11) bear witness to the truth that God blesses the life of faith. • let us strip off every weight: In Greco-Roman literature, a race is a metaphor for the need for endurance in life. Just as extra weight hinders a runner, sin . . . trips us up. It entangles us and restricts us from moving by faith.

12:10-11 There are at least two limitations on an earthly father’s discipline. First, his discipline, or education, is only for a few years (literally for a few days)—children eventually leave home. Second, earthly fathers were doing the best they knew how from their limited perspectives. By contrast, God’s discipline lasts throughout life and is always good for us, based on his limitless knowledge and love. His goal is that we might share in his holiness. Although it is painful, discipline brings about a peaceful harvest of right living. It brings God’s children into a state conducive to harmonious relationships and doing what is right (see also Rom 5:3-4; 8:17, 28; 2 Cor 4:17; Phil 1:12-14; Jas 1:2-4; 1 Pet 1:7; 4:14).