v. 20 The contrast Jude introduced with "But"distinguishes Jude's readers from the false teachers. Since we are God's temples under attack by hostile enemy forces, we need to build ourselves up, to strengthen ourselves spiritually (cf. 1 Cor. 3:9-17; Eph. 2:20-22; 2 Pet. 3:18).
"The best thing believers can do to withstand the malady is to develop their spiritual immunological resources."72
This is the first command, and it is a general order. What follows clarifies how to do this.
"Building up' (epoikodomountes) depicts this growth under the familiar figure of the erection of a house or temple. The compound verb points to the superstructure being reared on an existing foundation. The present tense underlines the fact that the building of a strong and stable Christian character is an ongoing process."73
". . . one can destroy in just a few hours that which has taken years to construct. However, to be a builder is much more fulfilling than being a destroyer!"74
"Your most holy faith"is the faith "once for all delivered to the saints"(v. 3). This is the foundation of our Christian life.
Second, true believers are not devoid of the Spirit (v. 19). We have Him and can pray in Him, namely, pray for God's help in harmony with the Spirit's desires (Eph. 6:18; Rom. 8:26-27; 1 Cor. 12:3; Gal. 4:6). Our greatest resource is God Himself. We secure His help through prayer.
"The development of spiritual maturity is vitally related to the practice of prayer at all times and in all places."75
v. 21 Third, we should keep ourselves in the sphere of God's love (vv. 1, 6, 13; cf. John 15:9; Rom. 5:5; 8:39). When we depart from His Word and His will, we erect barriers between ourselves and God thus blocking the free flow of His love to us. We keep ourselves in His love by abiding in Him (John 15:9-10).
"To be conscious of being beloved by God is one of the greatest protections that the believer can possess."76
Fourth, we should keep in mind and consciously look forward to the complete realization of our eternal life (cf. 1 John 3:2; Rom. 8:29). This will be the greatest manifestation of Jesus Christ's mercy to us as believers.
"The Rapture will be the consummating evidence of His mercy."77
In other words, Jude exhorted his readers to keep their hope in view. We have only a short time to wait and to remain faithful.
"The Christian life is viewed as having an inward look relating to the development of character [v. 20], an upward look relating to communion with God [vv. 20-21], and a forward look being consummated in final glorification [v. 21]."78
"The picture of the Christian life in terms of faith, hope, and love' (1 Cor. 13:13) is enriched by the addition of praying in the Holy Spirit.' There is also a carefully formulated reference to the Trinity: the Holy Spirit, the Father, and Jesus Christ."79
v. 22 Fifth, Jude's readers should tenderly help those of their fellow believers who were struggling and perhaps stumbling under the influence of the false teachers. Those in view are earnest doubters who sincerely cannot decide between truth and error. We should not abandon these brethren but restore them with compassion if possible.
v. 23 Sixth, Jude gave instruction concerning those believers who have already fallen under God's discipline by capitulating to false teachers. We should attempt to extract them from their error before their consequent judgment falls (cf. Amos 4:11; Zech. 3:2). Fire is symbolic of God's judgment in Scripture. Here Jude saw God's judgment coming on believers for yielding to sin or false teaching80and on unbelievers.81
In the case of those whom heresy has completely swept away, we should have pity on them rather than condemning them without compassion. Moreover we should regard them with fear, not fear of being infected by physical contact with them, but fear of falling under God's displeasure and discipline if we embrace their error. We should avoid any contact with these people because of the corrupting influence they can have on us through their words and actions (cf. 1 Cor. 5:9-11; 2 Thess. 3:14-15). The "garment"stands for those things affected by contact with fleshly behavior such as personal habits and practices, speech, companions, and the like. Scripture often uses garments as a symbol of what other people see, namely, our conduct.
