The writer who neglects punctuation, or mispunctuates, is liable to be misunderstood for the want of merely a comma, it often occurs that an axiom appears a paradox, or that a sarcasm is converted into a sermonoid. – Edgar Allan Poe

Grammarians squabble, and will squabble long. – Horace (65–8B.C.), De Arte Poetica, translated by George Colman, 1783

The serial comma is sexy, smart, and useful. – Author unknown