'Perfect' in the Bible

As for you, you have an anointing from the holy One and have perfect knowledge.

And now, dear children, continue in union with Him; so that, if He re-appears, we may have perfect confidence, and may not shrink away in shame from His presence at His Coming.

Dear friends, if our hearts do not condemn us, we have perfect confidence towards God;

Love has in it no element of fear; but perfect love drives away fear, because fear involves pain, and if a man gives way to fear, there is something imperfect in his love.