Strength:

sarah tobler
(from the we are women book)

"I myself have no power. It's the people behind me who have the power. Real power comes only from the Creator. It's in His hands. But if you're asking about strength, not power, then I can say that the greatest strength is gentleness." 

-Leon Shenandoah, Six Nations Iroquois Confederacy 

(source: Wisdomkeepers).