Science had better not free the minds of men too much, before it has tamed their instincts.
Who dares not speak his free thoughts is a slave.
The free man never thinks of escape.
Genius disregards the boundaries of propriety. Genius is permitted to shout if shouting is productive.
There is nothing more dangerous than an idea, when it is held by a man who has only one.
Tyrants have not yet discovered any chains that can fetter the mind.
Imagination is the mad boarder.
Her imagination was by habit ridiculously active; when the door was not open it jumped out the window.
One has to multiply thoughts to the point where there aren't enough policemen to control them
Action and faith enslave thought, both of them in order not be troubled or inconvenienced by reflection, criticism, and doubt.
Nothing is more fearful than imagination without taste.
If I let my brain follow its path unfettered, it would be kinda ugly.
The four walls of paper are like a prison because every idea wants to spring out in all directions - everything is connected with everything else, sometimes more than others.