Martin Luther,
Lessons in the Small Catechism of Dr…
“ We serve our Lord in everlasting righteousness, innocence, and blessedness. The kingdom of our Lord is, indeed, a glorious kingdom. In His kingdom we serve Him in righteousness. We are not righteous in ourselves, but our Lord has gained a perfect righteousness for us. He has fulfilled the Law in our stead. Clothed in Christ's blood and righteousness, we serve our Lord, and therefore our poor service is well-pleasing to God.—We serve our Lord in innocence. We are free from the guilt of our sins. Sad to say, we daily sin in the service of our Lord, we deserve nothing but punishment ”
