As you believe you are born of God, congratulations for believing you are perfect in the flesh. Just remember Matt7:2
The measure you use to judge others will be used to judge you
I do not believe that I am perfect in the flesh.
I have indwelling sin (1 John 1:8).
However, I will say that ideally, the element of sin dwelling in us can be rendered dead (Romans 6:6, Galatians 5:24, Romans 7:8) so that it no longer has any say over our behaviour (Romans 6:14).
For, we are not obligated to obey the flesh (Romans 8:12 (kjv, NLT); and this means that we can walk consistently, not after the flesh but after the Spirit, for an extended period of time; even for the rest of our lives (Luke 1:74-75).
And as for my judgment, I leave it to Jesus to do the judging.
For I do believe that the genuine believer is not under the law (Romans 6:14), is dead to the law (Romans 7:4, Galatians 2:19), and is delivered from the law (Romans 7:6), as concerning condemnation.