Matthew 5:48 (NASB)
Therefore you are to be perfect, as your heavenly Father is perfect.
The answer is a cautious “yes.” When Matthew 5:48 is carefully translated the word “perfect” means “to be complete.” We are to mirror or imitate God the Father in His moral supremacy and “completeness.” Is it possible to reflect the “integrity” of God’s moral superiority? A significant number of Christians believe that to achieve this supremacy is attainable. Those Christians that subscribe to such beliefs are following what is called “perfectionism.”
However, the harsh reality is that we Christians live in this world, and there are many pitfalls. The majority of Christians fall way short of perfection. Even the Apostle Paul had a wrestling match with sin as he wrote:
Romans 7: 14-25 (NASB)
14 For we know that the Law is spiritual, but I am of flesh, sold into bondage to sin.15 For what I am doing, I do not understand; for I am not practicing what I would like to do, but I am doing the very thing I hate. 16 But if I do the very thing I do not want to do, I agree with the Law, confessing that the Law is good. 17 So now, no longer am I the one doing it, but sin which dwells in me. 18 For I know that nothing good dwells in me, that is, in my flesh; for the willing is present in me, but the doing of the good is not. 19 For the good that I want, I do not do, but I practice the very evil that I do not want. 20 But if I am doing the very thing I do not want, I am no longer the one doing it, but sin which dwells in me.
21 I find then the principle that evil is present in me, the one who wants to do good.22 For I joyfully concur with the law of God in the inner man, 23 but I see a different law in the members of my body, waging war against the law of my mind and making me a prisoner of the law of sin which is in my members. 24 Wretched man that I am! Who will set me free from the body of this death? 25 Thanks be to God through Jesus Christ our Lord! So then, on the one hand I myself with my mind am serving the law of God, but on the other, with my flesh the law of sin.
For every sin and temptation, God will give us an escape plan. That flight is given to us by God’s grace! In theory, we can all achieve perfection, however living in a fallen world it is extremely unlikely! The only person I know that was perfect was Jesus Christ.
Psalm 19:7 (NASB)
The law of the Lord is perfect, restoring the soul;
The testimony of the Lord is sure, making wise the simple.