Who said "I'm learning patience, one worry at a time."?

This quote is attributed to Rex.

I'm learning patience, one worry at a time. - Rex

"I'm learning patience, one worry at a time."

Rex Patience

"I'm a dinosaur! RAWR!"

"Oh no, oh no, oh no, oh no, oh no!"

"I can't take the pressure!"

"Everything's gonna be okay, right?"

"Patience is a virtue I'm still learning."

"I may be a redhead, but I'm not a hothead."

"Patience is a virtue."

"Patience is a virtue I never learned."