From causes which appear similar, we expect similar effects. This is the sum total of all our experimental conclusions.

Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them.

Weakness, fear, melancholy, together with ignorance, are the true sources of superstition. Hope, pride, presumption, a warm indignation, together with ignorance, are the true sources of enthusiasm.

Heaven and hell suppose two distinct species of men, the good and the bad. But the greatest part of mankind float betwixt vice and virtue.

Custom, then, is the great guide of human life. It is that principle alone, which renders our experience useful to us, and makes us expect, for the future, a similar train of events with those which have appeared in the past.

Accurate and just reasoning is the only catholic remedy, fitted for all persons and all dispositions; and is alone able to subvert that abstruse philosophy and metaphysical jargon, which, being mixed up with popular superstition, renders it in a manner impenetrable to careless reasoners, and gives it the air of science and wisdom.

These arguments on each side (and many more might be produced) are so plausible, that I am apt to suspect, they may, the one as well as the other, be solid and satisfactory, and that reason and sentiment concur in almost all moral determinations and conclusions.