A comment that you will often come across whenever doing any sort of ambitious project is:
“That’s impossible.”
You may get that from people who doubt you. You may even, in your darker moments, comment that to yourself during the process of the making your project into reality.
There’s nothing wrong with people making that comment, or even you commenting that to yourself. It’s really hard to make something out of nothing. Even the strongest wills are often pushed to their limits.
But answer to that comment is really very simple:
“No. It’s necessary.”
That is the answer that has guided mankind’s rapid evolution since the dawn of time. It is the only answer that will allow us to continually push the human race forward, impossibility be damned.