I know of over 3,000 ways [that] a light bulb does not work.
Having a vision for what you want is not enough...Vision without execution is hallucination
I have far more respect for the person with a single idea who gets there than for the person with a thousand ideas who does nothing.
Being busy does not always mean real work.
The best thinking has been done in solitude. The worst has been done in turmoil.
Show me a thoroughly satisfied man - and I will show you a failure.