Who said "Strength is not merely physical—it is the will to endure."?

This quote is attributed to Thena.

Strength is not merely physical—it is the will to endure. - Thena

"Strength is not merely physical—it is the will to endure."

Thena Strength

"We have walked this Earth for thousands of years, watching civilizations rise and fall."

"My memories are both a gift and a curse that I carry."

"Violence is sometimes necessary, but it should never be our first choice."

"I have learned that strength comes not from power alone, but from purpose."

"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."