Therefore watch yourselves carefully, that you love the LORD your God.
Take good heed therefore unto yourselves,.... To be upon their guard, and to be watchful, were very necessary to them, that they might not be ensnared by the Canaanites, and drawn aside by them into idolatry, and so apostatize from the Lord and his worship, since their temptations would be many: that ye love the Lord your God; which would the most strongly influence and...
God pledges what He has already given as proof of what remains to be fulfilled. But His promise depends entirely on their keeping themselves clear of the Canaanites and their idolatry. Steadfast adherence to God's law will bring brilliant victories; any other path breaks the condition.
AI summary
Commenting on Joshua 23:5-11
Take good heed, therefore, that ye love the Lord your God--The sum of his exhortation is comprised in the love of God, which is the end or fulfilment of the law (Deu 6:5; Deu 6:11:13; Mat 22:37).