The LORD shall establish you an holy people to himself, as he has sworn to you, if you shall keep the commandments of the LORD your God…
Probation, in the case of the faithful, ends in establishment. If Israel would keep the commandments, God would "perfect, stablish, strengthen, settle" them as "an holy people" to himself, and so confirm the promises made to the fathers. A like promise to the Church and to Christians (Acts 16:5; Romans 1:11; Colossians 2:7; Hebrews 13:9; 1 Peter 5:10; 2 Peter 1:12). Establishment is:
1. Unto holiness.
2. A result of God naming his Name upon his people (ver. 12, Hebrew), i.e. dwelling with them, and revealing his attributes in saving, sanctifying, blessing, and exalting them.
3. The reward of fidelity.
4. A proof of God's fidelity. God "hath sworn" to fulfill his word (Hebrews 6:17, 18; cf. 1 Corinthians 1:9; Philippians 1:6). - J.O.
Parallel VersesKJV: The LORD shall establish thee an holy people unto himself, as he hath sworn unto thee, if thou shalt keep the commandments of the LORD thy God, and walk in his ways.