The writer next urged his readers to take specific action that would enhance their continuance in the faith.
This word of exhortation, as well as the others, reveals that the original readers were spiritually weak. Consequently the writer urged them to build up their strength so they could work effectively and walk without stumbling (cf. Prov. 4:25-27). The Greek word ektrepo, translated "be put out of joint"(v. 13), has the technical medical sense of a foot turning so as to become dislocated.404This power comes as we draw upon our resources for strength, namely, the Word of God and the ministry of our great High Priest (4:12-16). The readers also needed to level the path of discipleship they trod by removing impediments to their progress. Then the lame among them (i.e., the very weak) might recover as they proceeded to walk. The writer probably intended this exhortation to include laying aside sin (v. 1) and compromising associations with apostates who might throw unneeded barriers such as false teaching in the Christians' path.
This encouragement completes the thought of verses 1-13. The writer began with an exhortation, expounded the value of discipline, and ended with another exhortation.
"A depth of pastoral concern is evident throughout this section. The writer understood that faith can be eroded by constant exposure to harsh circumstances."405
