An alliance of civilisations can be our most powerful weapon in the fight against terror.

The most powerful weapon on earth is the human soul on fire.

The indisputable fact is that nutritional science is the most powerful weapon available to win the war on cancer.

The most powerful weapon in the world, as far as I'm concerned, is the camera.

The most valuable possession you can own is an open heart. The most powerful weapon you can be is an instrument of peace.

Satire is traditionally the weapon of the powerless against the powerful.