'Perfect' in the Bible

For I am confident of this very thing, that He who began a good work in you will perfect it until the day of Christ Jesus.

Not that I have already obtained it or have already become perfect, but I press on so that I may lay hold of that for which also I was laid hold of by Christ Jesus.

Let us therefore, as many as are perfect, have this attitude; and if in anything you have a different attitude, God will reveal that also to you;