When you become a son or a daughter of God, your disposition changes; your attitude changes; your all, your look towards life and towards others changes. It doesn't mean that you just have joined church; it means that you have been regenerated. You have become a new creation in Christ Jesus.
The Holy Spirit separates us from the things of the world, from the cares of this world, and our whole affections set on Christ Jesus. Whether we live or die, we serve Him and love Him, and go forward, doing all that we can to magnify Him unto the people.
Unbelief doesn't stop God, it doesn't hinder Him. I don't care how much the world unbelieves, It's still going to happen. Unbelief doesn't do nothing but condemns the unbeliever. The unbelief will send the unbeliever to Hell. It'll rob him of every blessing God promised to him, but it doesn't hinder God from going right on with the believer.
When you stand under the Divine promise of God, there's no fear in God. That's right. It's bound to be. It's perfect. It's never failed, and it will never fail, because God cannot lie. You can only believe God when He speaks and tells you, then you act upon what He says do.
So we can't be perfect ourself; we know we can't. There's no way for us to be, and yet He said for us to be. So, but what He did, He made appropriation for us, the Lord Jesus Christ and His righteousness. That's where the perfection comes of ignoring our own holiness, of which we have none, and our own thoughts which ought not to be, but we rest solemnly upon the finished work of the Lord Jesus. God sent Him to the earth, and it was in Him that we rest.