How do we know God uses imperfect people?

The Bible is filled with examples of God using individuals with imperfect pasts to accomplish His divine purposes. Jephthah is one such figure, as he was rejected by his family due to his ancestry, yet called back to lead Israel in a time of war. Similarly, figures like Rahab, a harlot, and King David, who committed adultery and murder, exemplify how God redeems sinners. This demonstrates that God does not look for perfection but rather obedience and faith, showcasing His grace to those who recognize their need for Him.