Consider:

An idea can be created out of nothing except an inspired imagination.
An idea weighs nothing.
It can be transferred across the world at the speed of light for virtually zero cost.
And yet an idea, when received by a prepared mind, can have extraordinary impact.
It can reshape that mind's view of the world.
It can dramatically alter the behavior of the mind's owner.
It can cause the mind to pass on the idea to others.
Many factors can amplify the power of ideas: mass media, technology and market forces, to name three