From metrios (moderate). Moderation, self-restraint, a measured approach. Related to the virtue of temperance that Scripture repeatedly commends.
The writer of Hebrews notes that the high priest should be able to deal gently with the ignorant and wayward, since he himself is subject to weakness (Hebrews 5:2). The concept of moderation in dealing with others' faults reflects God's own patience. Spiritual maturity produces measured responses, not harsh reactions.