A treatise of human nature

[I]t may not be amiss to observe from these definitions of natural and unnatural, that nothing can be more unphilosophical than those systems, which assert, that virtue is the same with what is natural, and vice with what is unnatural. For in the first sense of the word, Nature, as opposed to miracles, both vice and virtue are equally natural; and in the second sense, as oppos’d to what is unusual, perhaps virtue will be found to be the most unnatural. At least it must be own’d, that heroic virtue, being as unusual, is as little natural as the most brutal barbarity. As to the third sense of the word, ’tis certain, that both vice and virtue are equally artificial, and out of nature. For however it may be disputed, whether the notion of a merit or demerit in certain actions be natural or artificial, ’tis evident, that the actions themselves are artificial, and are perform’d with a certain design and intention; otherwise they cou’d never be rank’d under any of these denominations. ‘Tis impossible, therefore, that the character of natural and unnatural can ever, in any sense, mark the boundaries of vice and virtue.

If I must be a fool, as all those who reason or believe anything certainly are, my follies shall at least be natural and agreable.

Provided we agree about the thing, ’tis needless to dispute about the terms.

Next to the ridicule of denying an evident truth, is that of taking much pains to defend it; and no truth appears to me more evident, than that beasts are endow’d with thought and reason as well as men. The arguments are in this case so obvious, that they never escape the most stupid and ignorant.

[E]rrors in religion are dangerous; those in philosophy only ridiculous.

Where am I, or what? From what causes do I derive my existence, and to what condition shall I return? Whose favour shall I court, and whose anger must I dread? What beings surround me? and on whom have, I any influence, or who have any influence on me? I am confounded with all these questions, and begin to fancy myself in the most deplorable condition imaginable, inviron’d with the deepest darkness, and utterly depriv’d of the use of every member and faculty.

Most fortunately it happens, that since reason is incapable of dispelling these clouds, nature herself suffices to that purpose, and cures me of this philosophical melancholy and delirium, either by relaxing this bent of mind, or by some avocation, and lively impression of my senses, which obliterate all these chimeras. I dine, I play a game of back-gammon, I converse, and am merry with my friends; and when after three or four hours’ amusement, I wou’d return to these speculations, they appear so cold, and strain’d, and ridiculous, that I cannot find in my heart to enter into them any farther.