Who said "If something is hard to do, then it's not worth doing."?

This quote is attributed to Lisa Simpson.

If something is hard to do, then it's not worth doing. - Lisa Simpson

"If something is hard to do, then it's not worth doing."

Lisa Simpson Humor

"I'm not a bad girl, I'm just drawn that way."

"The only way to win is to not play."

"Understanding is the first step toward love."

"You can't keep blaming yourself. Just blame yourself once, and move on."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."