The rules of punctuation seem arbitrary. How can they not, when an apostrophe looks like nothing in this world so much as a comma that can’t keep its feet on the ground? Or when, by simply placing next to that wafting comma its twin, one creates (of all things) a quotation mark? – Richard Lederer and John Shore, Comma Sense: A Fun-damental Guide to Punctuation

I have spent most of the day putting in a comma and the rest of the day taking it out. – Oscar Wilde, variously worded paraphrase, see quoteinvestigator.com/2015/10/25/c

Grammar: The grave of letters. – Elbert Hubbard, The Roycroft Dictionary Concocted by Ali Baba and the Bunch on R

Every time you make a typo, the errorists win. – Author unknown