A contrast in quotes.

"The blade itself incites to deeds of violence." -Homer, Poet

"I do not love the bright sword for its sharpness, nor the arrow for its swiftness, nor the warrior for his glory. I love only that which they defend." -J.R.R. Tolkien, Author and veteran of the Battle of the Somme

Humans need no weapon to act violently, but a weapon certainly helps to defend against violent attack better than bare hands, feet, and teeth.