It isn't what we don't know that gives us trouble, it's what we know that ain't so.
In Hollywood the woods are full of people that learned to write but evidently can't read. If they could read their stuff, they'd stop writing.
Common sense ain't common.
Lettin' the cat outta the bag is a whole lot easier 'n puttin' it back in.
Everyone is a self-made man. Only the successful admit it.
The man who never makes a mistake must get tired of doing nothing.