Turn your churches into halls of science, and devote your leisure day to the study of your own bodies, the analysis of your own minds, and the examin… - Frances Wright

I must intreat your patience — your gentle hearing. I am not going to question your opinions. I am not going to meddle with your belief. I am not going to dictate to you mine. All that I say is, examine; enquire. Look into the nature of things. Search out the ground of your opinions, the for and the against. Know why you believe, understand what you believe, and possess a reason for the faith that is in you… But your spiritual teachers caution you against enquiry — tell you not to read certain books; not to listen to certain people; to beware of profane learning; to submit your reason, and to receive their doctrines for truths. Such advice renders them suspicious counsellors. By their own creed, you hold your reason from their God. Go! ask them why he gave it.

Dating, as we justly may, a new era in the history of man from the Fourth of July, 1776, it would be well, that is, it would be useful, if on each anniversary we examined the progress made by our species in just knowledge and just practice.

Ambition is the necessary spur of a great mind to great action; when acting upon a weak mind it impels it to absurdity, or sours it with discontent.