What does the Bible say about Christ being formed in us?

In Galatians 4:19, the Apostle Paul expresses his deep desire for Christ to be formed in the Galatian believers. This phrase captures the essence of being born again, where the Holy Spirit works within us to conform us to the image of Christ. It's not merely about adopting a set of moral standards or observing religious rituals; it speaks to a radical transformation of our very being. The operation of God in regeneration brings about this formation of Christ within us, resulting in a new creation marked by faith and an intimate relationship with God. This transformation is vital, for apart from it, one cannot truly know or experience eternal life as defined in Scripture.