Who said "Patience is essential in the laboratory."?

This quote is attributed to Dexter.

Patience is essential in the laboratory. - Dexter

"Patience is essential in the laboratory."

Dexter Patience

"What does this button do?"

"I must focus on my work."

"Science rules!"

"Dee Dee, get out of my laboratory!"

"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."