What does the Bible say about sufficiency in Christ?

In 2 Corinthians 3:5, the Apostle Paul explicitly states that 'not that we are sufficient of ourselves to think anything as of ourselves; but our sufficiency is of God.' This verse underscores the truth that any ability we have to serve God or please Him comes not from our own merits or strengths but solely from God's grace and provision. We are reminded that, as sinners, we cannot achieve righteousness or bear fruit without divine assistance, yet through Christ we have the ability to triumph over sin and live a life that pleases God.