The mixture spoils two good things, as Charles Lamb (Elia) used to say of brandy and water.

The good things of life are not to be had singly, but come to us with a mixture.

A presentation copy...is a copy of a book whoch does not sell, sent you by the author, with his foolish autograph at the beginning of it; for which, if a stran…

A pun is a pistol let off at the ear; not a feather to tickle the intellect.