Who said "Strength is not measured by muscles but by character."?

This quote is attributed to Christopher Peterson.

Strength is not measured by muscles but by character. - Christopher Peterson

"Strength is not measured by muscles but by character."

Christopher Peterson Strength

Psychologist American 1950–2012

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"Positive psychology takes seriously the fact that people want more than just to not be miserable."

"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."