Who said "The body can be trained; the mind must be mastered."?

This quote is attributed to Elektra.

The body can be trained; the mind must be mastered. - Elektra

"The body can be trained; the mind must be mastered."

Elektra Education

"I am the hand that strikes in the darkness."

"Mercy is a luxury we cannot afford."

"I've learned that attachment is a weakness."

"The world is not black and white—it is red."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."