Should a Christin's focus and energy be directed toward his or her perfection?
I'm not so sure we should strive for perfection. At least not in the way that some mean it.
Didn't the Apostle Paul (when Saul) strive for perfection?
Actually because of new birth and the divine nature we have perfection. The problem is that we have imperfection as well, the two will struggle for control until the redemption of the purchased price, the translation of our bodies. Paul always strove for perfection:
Not that I have already obtained all this, or have already been perfected, but I press on to take hold of that for which Christ Jesus took hold of me. Brothers, I do not consider myself yet to have laid hold of it. But one thing I do: Forgetting what is behind and straining toward what is ahead, I press on toward the goal to win the prize of God’s heavenly calling in Christ Jesus.… (Philipians 3:12-14)
What is that prize, that heavenly calling in Christ Jesus? Because that is what Paul called perfection and what he strove for, confessing that we have not attained or already been perfected.
If then you have been raised with Christ, seek the things that are above, where Christ is, seated at the right hand of God. Set your minds on things that are above, not on things that are on earth. For you have died, and your life is hidden with Christ in God. When Christ who is your life appears, then you also will appear with him in glory. (Col. 3:1-4)
If things were perfect now, or even perfectible Paul would just be telling us how to be perfect. But perfection is in Christ, the Holy Spirit always directs our attention to Christ, who is in heaven along with the eternal life he has promised us. I don't know how to tell you to attain it but I do know where to find it, perfection is found in Christ.
Grace and peace,
Mark