Creativity takes on many forms

Make it your business to know who each of these folks are/were they have what the Finnish people call Sisu*

*Sisu is a Finnish term meaning, roughly, inner strength, determination, perseverance in the face of  adversity, and a strong work ethic.

You can't use up creativity. The more you use, the more you have. (Maya Angelou)

Have the courage to follow your heart and intuition. They somehow already know what
 you truly want to become. Everything else is secondary. (Steve Jobs)

Albert Einstein said, "Creativity is the residue of time wasted."

The artist begins with a vision – a creative operation requiring an effort. (Henri Matisse)

Do it no matter what. If you believe in it, it is something very honorable. If somebody around you or your family does not understand it, then that's their problem. But if you do have a passion, 
an honest passion, just do it. (Mario Andretti)

Get a good idea and stay with it. Dog it, and work at it until it's done right. (Walt Disney)

When you've got it, you've got it. When you haven't, you begin again.
 All the rest is humbug. (Edouard Manet)

If you stick to your work it will take care of you somehow. (Kiki Smith)

I would add: 

Creativity takes effort.  More people would be creative if they just saw the value in
putting time into it. What ever it is!

t'*s a combination of stamina, courage, and obstinacy held in reserve for hard times

ee'-soo) is a unique Finnish concept that cannot be fully translated.  One definition is: spec*ial strength and stubborn determination to continue and overcome in the moment of adversity.  It's a combination of stamina, courage, and obstinacy held in reserve for hard times