All doors open to courtesy.

Fair words never hurt the tongue.

The small courtesies sweeten life; the great ennoble it.

The mark of a man is how he treats a person who can be of no possible use to him.

Politeness is to human nature what warmth is to wax.

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.

Love may fail, but courtesy will prevail.

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.

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

There is great force hidden in a sweet command.

In truth, politeness is artificial good humor, it covers the natural want of it, and ends by rendering habitual a substitute nearly equivalent to the real virtue.

Courtesy is the politic witchery of great personages.

There is a courtesy of the heart. It is akin to love. Out of it arises the purest courtesy in the outward behavior.

All doors open to courtesy

We must be as courteous to a man as we are to a picture, which we are willing to give the advantage of a good light.

It is wise to apply the oil of refined politeness to the mechanism of friendship.

Courtesy is the due of man to man; not of suit-of-clothes to suit-of-clothes.

Politeness, n. The most acceptable hypocrisy.

It's nice to be important, but it's more important to be nice.

The knowledge of courtesy and good manners is a very necessary study. It is, like grace and beauty, that which begets liking and an inclination to love one another at the first sight.