What does the Bible say about faith and sin?

In Romans 14:23, Paul emphasizes that whatever is not of faith is sin, encapsulating a vital principle of the Christian faith. This means that actions or deeds undertaken outside of true faith, which is the faith of God's elect, do not please God. The context of this scripture highlights the importance of individual conviction based on biblical understanding and cautions against hypocrisy in exercising Christian liberty. Faith, therefore, serves as the foundation for pleasing God, and any action not rooted in faith ultimately stems from personal will rather than divine guidance.