Drawing from Joshua 9, this sermon examines the costly mistake made by the leaders of Israel when they entered into a covenant with the Gibeonites without seeking God's counsel. The Gibeonites, a neighboring people who feared Israel's God, devised an elaborate deception to secure a peace treaty with Israel by disguising themselves as ambassadors from a distant land. Israel's leaders investigated the evidence carefully and acted reasonably by human standards, yet they never once brought the matter before God in prayer. The consequences of that single prayerless moment echoed for generations. The sermon calls believers to recognize their vulnerability to the same error, challenging them to make prayer the first response to every significant decision rather than a last resort. True wisdom is not found in human reasoning, research, or investigation alone, but in submitting every decision to the God who sees what we cannot see and knows what we do not know.