Never throw mud: you can miss ...

Never throw mud: you can miss the target, but your hands will remain dirty.
 Dorothy Parker

Quotes from the same author

Time may be a great healer, but it's a lousy beautician.
 Dorothy Parker
Telegram to a friend who had just become a mother after a prolonged pregnancy: Good work, Mary. We all knew you had it in you.
 Dorothy Parker
For this my mother wrapped me warm, And called me home against the storm, And coaxed my infant nights to quiet, And gave me roughage in my diet, And tucked me in my bed at eight, And clipped my hair, and marked my weight, And watched me as I sat and stood: That I might grow to womanhood To hear a whistle and drop my wits And break my heart to clattering bits.
 Dorothy Parker
The best way to keep children at home is to make the home atmosphere pleasant, and let the air out of the tires.
 Dorothy Parker
The plot is so tired that even this reviewer, who in infancy was let drop by a nurse with the result that she has ever since been mystified by amateur coin tricks, was able to guess the identity of the murderer from the middle of the book.
 Dorothy Parker