All men dream, but not equally.
Those who dream by night in the dusty recesses
of their minds wake in the day to find that it was vanity:
but the dreamers of the day are dangerous men, for they may act
their dream with open eyes, to make it possible.

—T. E. Lawrence, "The Seven Pillars of Wisdom"

A ship in port is safe, but that is not what ships are built for.

—Grace Hopper