What does it mean to be 'in the faith' according to the Bible?

The phrase 'in the faith' refers to the state of being united with Christ, wherein believers collectively hold to the same truth about Him. In the sermon, it is pointed out that saying we are 'in the faith' aligns with being 'in Christ,' signifying a deep spiritual connection and shared belief in the person of Jesus. Ephesians 4 emphasizes that there is one faith, underscoring the unity of belief among Christians. This unity isn't merely doctrinal but relational, anchored in mutual love and fellowship fostered by the Holy Spirit among those in Christ. Thus, to be 'in the faith' is to acknowledge one Lord, one faith, and one baptism as essential to the identity of every believer.