Thank you for your thoughts, and for centering living the Christian life on faith and love. A couple of other thoughts:
The fact is, the Bible hardly speaks of sanctification or holiness in this way. It speaks of it much more as a status of belonging to God, and as a purpose for which God has called his people. This is why the Corinthian church, filled with problems, was still called by Paul as saints, meaning the holy, sanctified, set apart ones. So are we if we belong to Christ, no matter what our problems, how mature or immature we may be, how long we’ve been in the faith, etc. God has called us into Christ and through the power of his Spirit to be set apart for his purposes in this world. That is what being sanctified largely means. That we can grow in this capacity is a given. That we grow to somehow be more sanctified is another story. in a sense, we are or we aren’t. In Christ, we are.
Secondly, this description is applied to communities of people in both testaments much more often than to individuals. Israel was called to be God’s holy/sanctified people. The renewed Israel, churches in Galatia, Corinth, Ephesus, etc., in Christ was called to be his holy people in order to reveal God to the world. This makes the work of sanctification not simply an individual pursuit of holiness, but a combined effort to work together to live the Lord’s prayer together, “your kingdom come, your will be done on earth as it is in heaven.” We learn to live this as God’s people in cooperation with and love for one another.
It’s like being called to play on the football team. The coach says you belong, it’s a given. Your purpose is to help the team play to its intended capacity and purpose in whatever position you’re fitted and called to play. That’s what the players individually and collectively have been set apart/sanctifed for, except in this case it is for us to work together to help the group/church in our own localities to grow in a shared faith, hope, and love.
I think that the overly individualist preoccupation with our own progressive sanctification, which in many ways is a distortion of what sanctification means or how it functions biblically, is put largely to rest when these emphases come into focus.
Frank