The sermon explores the complex situation of the Reubenites, Gadites, and half-tribe of Manasseh who built an altar near the Jordan River after entering the Promised Land, examining their actions through the lens of faith, fear, and covenant obligation. It highlights the importance of discerning motives, avoiding hasty judgments, and recognizing God as the ultimate witness, emphasizing that even amidst conflict and potential disobedience, God's grace and faithfulness remain constant, ultimately pointing to Christ as the perfect sacrifice and guarantor of an eternal inheritance for those who trust in Him.