Can I show you my hallucination?

At some point I read a quote - by some people attributed to Thomas Edison, while other people doubt it - and I admit, it might be stated in a fashion more contemporary than what Edison might have done it.
But still, it is a good quote, so I want to share it anyway:

Vision without execution is hallucination

Actually Edison - or whoever is responsible - has a point. All our grandiose ideas are worth nothing, if they are not realised. But still, I do not think that we should abandon all hope, just because we cannot execute our visions on our own.
That's where our networks become handy - and where we should be demanding towards ourselves. Because: if I have a vision so exceptional that I realise that I will never ever execute it myself, then I cannot help but think that I have a responsibility to consider, whether I know anyone present it to - even if to me, it is a hallucination, it might be that they know how to execute it. The quote does not demand that all parts of the process must be carried out by the same individual.
And every time we doubt whether our visions can be executed, we can consider another quote (which is generally agreed to be by William Blake):

What is now proved was once only imagined.

(Translated from Må jeg vise dig min hallucination?, originally published December 5th, 2011)