There is great force hidden in a sweet command.

Courtesy which oft is found in lowly sheds, with smoky rafters, than in tapestry halls and courts of princes, where it first was named.

Be nice to people on your way up because you'll meet 'em on your way down.

Lip courtesy pleases much and costs little.

Hail! the small courtesies of life, for smooth do ye make the road of it, like grace and beauty, which beget inclinations to love at first sight; it is ye who open the door and let the stranger in.

Nothing is more valuable to a man than courtesy.

Love may fail, but courtesy will prevail.

Nothing is ever lost by courtesy. It is the cheapest of pleasures; costs nothing and conveys much. It pleases the one who gives and him who receives, and thus, like mercy, is twice blessed.