“You are searching for the magic key that will unlock the door to the source of power; and yet you have the key in your own hands, and you may use it the moment you learn to control your thoughts.” — Napoleon Hill
“Success – my nomination for the single most important ingredient is energy well directed.” — Louis Lundborg
“No great improvements in the lot of mankind are possible until a great change takes place in the fundamental constitution of their modes of thought.” — John Stuart Mill