Who said "Don't watch the clock; do what it does. Keep going"?

This quote is attributed to Wisdom, John.

Don't watch the clock; do what it does. Keep going - Wisdom, John

"Don't watch the clock; do what it does. Keep going"

Wisdom, John Perseverance

Philosopher British 1904–1993

"The only true wisdom is in knowing you know nothing"

"Life is what happens when you're busy making other plans"

"The greatest glory in living lies not in never falling, but in rising every time we fall"

"Your time is limited, don't waste it living someone else's life"

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."