Who said "I must focus on my work."?

This quote is attributed to Dexter.

I must focus on my work. - Dexter

"I must focus on my work."

Dexter Work

"What does this button do?"

"Science rules!"

"Dee Dee, get out of my laboratory!"

"The mind is the greatest invention of all."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."