Who said "The greatest lesson is learned through defeat."?

This quote is attributed to Sif.

The greatest lesson is learned through defeat. - Sif

"The greatest lesson is learned through defeat."

Sif Education

"I have waited lifetimes for this moment."

"A warrior's heart beats strongest in battle."

"We are bound by more than just duty."

"The past shapes who we become."

"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."