Okay here's a few more (I'm a little obsessive about quotes):

"Bless the days that saw us young, and years that made us wise."

Julia Ward Howe

Be careful about reading health books. You may die of a misprint.

Mark Twain

A little neglect may breed mischief: for want of a nail the shoe was lost; for want of a shoe the horse was lost; and for want of a horse the rider was lost.

Benjamin Franklin