The following precept was laid down thousands of years ago for the Egyptian civil service:
Be courteous and tactful as well as honest and diligent. All your doings are publicly known, and therefore be beyond complaint or criticism. Be absolutely impartial. Always give a reason for refusing plea; complainants like a kindly hearing even more than a successful plea. Preserve dignity but avoid inspiring fear. Be an artist in words, that you may be strong, for the tongue is a sword.
Be courteous and tactful as well as honest and diligent. All your doings are publicly known, and therefore be beyond complaint or criticism. Be absolutely impartial. Always give a reason for refusing plea; complainants like a kindly hearing even more than a successful plea. Preserve dignity but avoid inspiring fear. Be an artist in words, that you may be strong, for the tongue is a sword.