How could politics be a science, if laws and forms of government had not a uniform influence upon society? Where would be the foundation of morals, if particular characters had no certain or determinate power to produce particular sentiments, and if these sentiments had no constant operation on actions?

We can conceive a thinking being to have either many or few perceptions. Suppose the mind to be reduced even below the life of anoyster. Suppose it to have only one perception, as of thirst or hunger. Consider it in that situation. Do you conceive any thing but merely that perception? Have you any notion of self or substance? If not, the addition of other perceptions can never give you that notion.

The greater part of mankind may be divided into two classes; that of shallow thinkers who fall short of the truth; and that of abstruse thinkers who go beyond it.

All morality depends upon our sentiments; and when any action or quality of the mind pleases us after a certain manner we say it is virtuous; and when the neglect or nonperformance of it displeases us after a like manner, we say that we lie under an obligation to perform it.

If God is omnipotent, omniscient and wholly good, whence evil? If God wills to prevent evil but cannot, then He is not omnipotent. If He can prevent evil but does not, then he is not good. In either case he is not God.

In this sullen apathy neither true wisdom nor true happiness can be found.

When anyone tells me that he saw a dead man restored to life, I immediately consider with myself whether it be more probable that this person should either deceive or be deceived or that the fact which he relates should really have happened. I weigh the one miracle against the other and according to the superiority which I discover, I pronounce my decision. Always I reject the greater miracle. If the falsehood of his testimony would be more miraculous than the event which he relates, then and not till then, can he pretend to command my belief or opinion.