for the excellence of the knowledge of Christ Jesus my Lord,
for whom I have suffered the loss of all things, and count
them as rubbish, that I may gain Christ.”
For the Christian, Christ is increasing, Christ is becoming larger and larger, Christ is becoming the focus. It is quite simple to see who is, and who is not, living up to this standard.
The more spiritually mature a person is the more Christ-centered they cannot help but become. This is the unavoidable and inevitable consequence of becoming a Christian, a disciple of Jesus. This is how the Holy Spirit leads each and every true believer, and there are no exceptions to the rule. It is as predictable and certain as the sunrise following after the darkness of night.