Who said "Strength comes not from flesh, but from will."?

This quote is attributed to Pod.

Strength comes not from flesh, but from will. - Pod

"Strength comes not from flesh, but from will."

Pod Strength

"I am of the night."

"The things we love destroy us."

"A man can be wise and still be foolish."

"Strength is not always found in swords."

"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."