Beware of over-confidence; especially in matters of structure.
Cass Gilbert

Beware of over-great pleasure in being popular or even beloved.
Margaret Fuller

Beware of people carrying ideas. Beware of ideas carrying people.
Barbara Grizzuti Harrison

Beware of the man who does not return your blow: he neither forgives you nor allows you to forgive yourself.
George Bernard Shaw

Beware of the man who rises to power from one suspender.
Edgar Lee Masters

Beware of the man who will not engage in idle conversation; he is planning to steal your walking stick or water your stock.
William Emerson

Beware of the man who works hard to learn something, learns it, and finds himself no wiser than before.
Kurt Vonnegut

Beware of the naked man who offers you his shirt.
Navjot Singh Sidhu

Beware of the person of one book.
Thomas Aquinas

Beware of the person who can't be bothered by details.
William Feather

Beware of your habits. The better they are the more surely they will be your undoing.
Holbrook Jackson

Beware prejudices. They are like rats, and men's minds are like traps; prejudices get in easily, but it is doubtful if they ever get out.
Lord Jeffrey

Beware that you do not lose the substance by grasping at the shadow.
Aesop

Beware the barrenness of a busy life.
Socrates

Beware the cute, hot guy who kind of reminds you of the parent you don't get along with: your cold, distant father who left when you were a kid or your hot-tempered mother whom you could never please.
Merrill Markoe

Beware the ends of the earth and the exotic: the drama is on your doorstep wherever the slums; are, wherever there is malnutrition, wherever there is exploitation and cruelty.
John Grierson

Beware the fury of a patient man.
John Dryden

Beware the hobby that eats.
Benjamin Franklin

Beware the man who doesn't ask you any questions about yourself on your first date.
Merrill Markoe

Beware the old man in young guy's clothes. If he's over 35 and comes to pick you up looking as though he's headed for a skateboarding competition while you are dressed to go to a nice restaurant, this is not a good sign.
Merrill Markoe