'Perfect' in the Bible

But I urge you, believers, by the name of our Lord Jesus Christ, that all of you be in full agreement in what you say, and that there be no divisions or factions among you, but that you be perfectly united in your way of thinking and in your judgment [about matters of the faith].

Howbeit we speak wisdom among them that are perfect: yet not the wisdom of this world, nor of the princes of this world, that come to nought:

But when that which is perfect is come, then that which is in part shall be done away.

Brethren, become not children in the understanding, but in the evil be ye babes, and in the understanding become ye perfect;