I never did a day's work in my life, it was all fun. - Thomas Edison

Opportunity is missed by most people because it is dressed in overalls and looks like work.

The most necessary task of civilization is to teach people how to think. It should be the primary purpose of our public schools. The mind of a child is naturally active, it develops through exercise. Give a child plenty of exercise, for body and brain. The trouble with our way of educating is that it does not give elasticity to the mind. It casts the brain into a mold. It insists that the child must accept. It does not encourage original thought or reasoning, and it lays more stress on memory than observation.

The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.