so that you may learn to recognize and treasure what is excellent [identifying the best, and distinguishing moral differences], and that you may be pure and blameless until the day of Christ [actually living lives that lead others away from sin];

Not that I have already obtained it [this goal of being Christlike] or have already been made perfect, but I actively press on so that I may take hold of that [perfection] for which Christ Jesus took hold of me and made me His own.

I press on toward the goal to win the [heavenly] prize of the upward call of God in Christ Jesus.