When we believe in someone or something, we are convinced, but it doesn't necessarily change our behavior...but when we trust, we are convinced, and it produces change. Israel struggled with trust, so at Sinai, the Lord called them to hear Him. That Hebrew word sama means to carefully hear, listen to and obey. The depth of our relationship with the Lord determines how well we are doing this, and the proof is conforming to His will, rejecting spiritual neglect, and producing the fruit of righteousness.