When I get an idea I start at once building it up in my imagination. I change the construction, make improvements and operate the device in my mind. It is absolutely immaterial to me whether I run my turbine in my thought or test it in my shop. I even note if it is out of balance.
Nikola TeslaTo stop war by the perfection of engines of destruction alone, might consume centuries and centuries. Other means must be employed to hasten the end.
Nikola TeslaOf all the frictional resistances, the one that most retards human movement is ignorance.
Nikola Tesla