Food for thought - shop signs

I saw the following sign on the wall in a woodworking shop :

"The easy way is hard enough."

The other one read:

"If you didn't have time to do it right in the first place, how come you have the time to do it over? "

And here is another one from my collection :

Either you is or you ain't;
Either you can or you cain't;

Either you will or you won't;
Either you do or you don't.