What is your favorite inspirational quote when you're having a tough day?

I love quotes! Here are a few I keep on my desk for whenever I need a little "mental boost":

"I have not failed; I've found 10,000 ways that won't work." - Thomas Edison

"The mediocre teacher tells; the good teacher explains; the superior teacher demonstrates; the great teacher inspires." - William Arthur Ward

"The way I see it, if you want the rainbow, you gotta put up with the rain." - Dolly Parton

"All things are difficult before they are easy." - John Norley

Great topic! Can't wait to see what keeps everyone else going too :smileyvery-happy:

It always seems impossible until it's done.  -Nelson Mandela

In order to fly, all one must do is simply miss the ground - Douglas Adams

Don't get it right, get it written!

 Great things in business are never done by one person. They're done by a team of people - Steve Jobs

Go big or go home. – unknown

When you want something, all the universe conspires in helping you to achieve it. - Paulo Coelho

Get comfortabe being uncomfortable. Get confident being uncertain. Don't give up just because something is hard. Pushing through challenges is what makes you grow. 

Success is peace of mind which is a direct result of self-satisfaction in knowing you did your best to become the best you are capable of becoming.
John Wooden