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

This quote is attributed to Hermann Ebbinghaus.

Don't watch the clock; do what it does. Keep going. - Hermann Ebbinghaus

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

Hermann Ebbinghaus Perseverance

Psychologist German 1850–1909

"Memory is the mother of all wisdom."

"The true art of memory is attention."

"We live in succession, in division, in parts, in particles. Meantime within man is the soul of the whole."

"Without repetition, nothing is learned."

"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."