Nikola Tesla Mind over Matter

Before I put a sketch on paper, the whole idea is worked out mentally.
In my mind I change the construction, make improvements, and even operate the device.
Without ever having drawn a sketch I can give the measurements of all parts to workmen,
and when completed all these parts will fit, just as certainly as though I had made the actual drawings.
It is immaterial to me whether I run my machine in my mind or test it in my shop.
The inventions I have conceived in this way have always worked.
In thirty years there has not been a single exception.
My first electric motor, the vacuum wireless light, my turbine engine
and many other devices have all been developed in exactly this way.
NIKOLA TESLA