That the sun shines tomorrow is a judgement that is as true as the contrary judgement.

When I am convinced of any principle, it is only an idea which strikes more strongly upon me. When I give the preference to one set of arguments above another, I do nothing but decide from my feeling concerning the superiority of their influence.

Generally speaking, the errors in religion are dangerous; those in philosophy only ridiculous.

In all matters of opinion and science ... the difference between men is ... oftener found to lie in generals than in particulars; and to be less in reality than in appearance. An explication of the terms commonly ends the controversy, and the disputants are surprised to find that they had been quarrelling, while at bottom they agreed in their judgement.

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.

The bigotry of theologians is a malady which seems almost incurable.

The heart of man is made to reconcile the most glaring contradictions.