[Elsie]

"The founding fathers didn't believe in the future. They believed it in. You're always believing ahead of your evidence."

O...K...

[Jamestown1630]

I think Frost was referring to the idea that our faith in our ideals helps to usher them into reality.

That seems to have been the case for a band of very idealistic thinkers who managed to triumph over the most powerful military of their time, against all odds.