“make yourselves holy.” The people were to do what it took to make themselves holy in the sight of God. The Bible In Basic English (BBE) gets the idea of the verse in translating the phrase, “for this reason, make and keep yourselves holy.” The translation, The Scriptures, done by the Institute for Scripture Research, South Africa), has: “you shall set yourselves apart.”
[For more on “make yourselves holy,” see commentary on Joshua 3:5.]