“If we take in our hand any volume; of divinity or school metaphysics, for instance; let us ask, Does it contain any abstract reasoning concerning quantity or number? No. Does it contain any experimental reasoning concerning matter of fact and existence? No. Commit it then to the flames: for it can contain nothing but sophistry and illusion.”

“When we run over libraries, persuaded of these principles, what havoc must we make? If we take in our hand any volume of divinity or school metaphysics, for instance, let us ask, Does it contain any abstract reasoning concerning quantity or number? No. Does it contain any experimental reasoning concerning matter of fact and existence? No. Commit it then to the flames, for it can contain nothing but sophistry and illusion.”

“In our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral evidence. A wise man, therefore, proportions his belief to the evidence.”

“Carelessness and in-attention alone can afford us any remedy. For this reason I rely entirely upon them.”

“As every inquiry which regards religion is of the utmost importance, there are two questions in particular which challenge our attention, to wit, that concerning its foundation in reason, and that concerning it origin in human nature.”

“No conclusion can be more agreable to scepticism than such as make discoveries concerning the weakness and narrow limites of human reason and capacity”

“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.”