Establish you: this gives the idea of firmness, permanence, endurance (also in 29.13).

A people holy to himself: that is, “a people completely dedicated to him” (7.6; 14.2; see Exo 19.6), namely, “his own special people” (Contemporary English Version).

As he has sworn to you: the LORD’s solemn promise (see 1.8).

Keep the commandments of the LORD your God, and walk in his ways: these are two ways of saying the same thing, for emphasis; for walk in his ways see 8.6; 10.12.

Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on Deuteronomy. (UBS Helps for Translators). New York: UBS, 2000. For this and other handbooks for translators see here .