“It is an observation suggested by all history, and by none more than by that of James I and his successor [Charles I], that the religious spirit, when it mingles with faction, contains in it something supernatural and unaccountable; and that, in its operations upon society, effects correspond less to their known causes than is found in any other circumstance of government.”

“Nothing is more important to a nation than its history. It is the earth upon which any society stands.”

“Religious controversies are always productive of more acrimony and irreconcilable hatreds than those which spring from any other cause. I had hoped that liberal and enlightened thought would have reconciled the Christians so that their religious fights would not endanger the peace of Society.”

“Always be wary of any helpful item that weighs less than its operating manual.”

“The history of a man's soul, even the pettiest soul, is hardly less interesting and useful than the history of a whole people; especially when the former is the result of the observations of a mature mind upon itself, and has been written without any egotistical desire of arousing sympathy or astonishment. Rousseau's Confessions has precisely this defect – he read it to his friends.”

“Princes and governments are far more dangerous than other elements within society.”