It should've been:
"It is surely better to reign in Hell,
Than to have your ideas denigrated
By those who would insist that this is Heaven."
I love iambic pentameter. Sorry.
A good point, though, especially about the true nature of Freedom.
Could it not be said that, if "The mind... Can make a Heav'n of Hell, a Hell of Heav'n", the recognition of our current existence as being a "Hell", thus, effectively, making us masters of it, would render it as a "Heaven" compared to how it is for others?