American poet and philosopher Ralph Waldo Emerson says, “Manners are the happy ways of doing things; each one a stroke of genius or of love, now repeated and hardened in usage. They form at last a rich varnish, with which the routine of life is washed and its details adorned.”
Courteous people are happy people. Rude people are always unhappy, angry, and miserable and walk around with a chip on their shoulders. “The merciful man does good for his own soul, but he who is cruel troubles his own flesh.” (Proverbs 11:17)