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

This quote is attributed to Pickering Edward.

Don't watch the clock; do what it does. Keep going. - Pickering Edward

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

Pickering Edward Perseverance

Astronomer American 1846–1919

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

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

"Love all, trust a few, do wrong to none."

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

"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."