Who said "My eyes are not what they were, but my mind remains clear."?

This quote is attributed to Leonhard Euler.

My eyes are not what they were, but my mind remains clear. - Leonhard Euler

"My eyes are not what they were, but my mind remains clear."

Leonhard Euler Strength

Mathematician Swiss 1707–1783

"Read Euler, read Euler, he is the master of us all."

"The beauty of a mathematical proof lies not in its length but in its elegance."

"Life is but a moment, yet mathematics is eternal."

"In mathematics, you don't understand things. You just get used to them."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."