Who said "What we have once enjoyed, we can never lose."?

This quote is attributed to Hermann Ebbinghaus.

What we have once enjoyed, we can never lose. - Hermann Ebbinghaus

"What we have once enjoyed, we can never lose."

Hermann Ebbinghaus Happiness

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."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."