Luther

See, then, how in like manner, under the great diversity of the various states and persons called for in this life and ordained by Him, God has created one being and one unity with this intent, that each one in fulfilling his ministry shall do the work allotted to him as his state demands, performing it with that humility which regards all states and persons as equal before God, as being all created equal and having the one as much favour with Him as the other, so that no one may pride himself before God and his neighbor.—Sermons, 153