Youth doesn't take advice.

First, study the present construction. Second, ask for all past experiences ...study and read everything you can on the subject.

Of all my inventions, I liked the phonograph best

The greatest discoveries will be along spiritual lines. This is the field where miracles are going to happen. Spiritual power is the greatest underdeveloped power and has the greatest future.

To do much clear thinking a person must arrange for regular periods of solitude when they can concentrate and indulge the imagination without distraction.

I am long on ideas, but short on time. I expect to live to be only about a hundred.

Genius is one percent inspiration, ninety-nine percent perspiration.