What does the Bible say about God's sufficiency?

In Exodus 3:12, God promises Moses, 'Certainly I will be with thee,' indicating that Moses' sufficiency and ability to carry out God's work comes solely from God's presence and power. In Isaiah 41:10, God reassures His people by saying, 'Fear thou not; for I am with thee.' This demonstrates that we are called to rest completely in God for guidance, strength, and righteousness. The Apostle Paul elucidates this in 2 Corinthians 3:5, where he states, 'Not that we are sufficient of ourselves to think anything of ourselves; but our sufficiency is of God.' Understanding that our sufficiency is found in God alone is essential for both salvation and for effectively preaching the Gospel.