Sim

“Nothing in this world is perpetual; Every thing, however seemingly firm, is in continual flux and change: The world itself gives symptoms of frailty and dissolution: How contrary to analogy, therefore, to imagine, that one single form, seeming the frailest of any, and subject to the greatest disorders, is immortal and indissoluble? What a daring theory is that! How lightly, not to say how rashly, entertained! How to dispose of the infinite number of posthumous existences ought also to embarrass the religious theory. Every planet, in every solar system, we are at liberty to imagine people with intelligent, mortal beings: At least we can fix on no other supposition. For these, a new universe must, every generation, be created beyond the bounds of the present universe: or one must have been created at first so prodigiously wide as to admit of this continual influx of beings. Ought such bold suppositions to be received by any philosophy: and that merely on the pretext of a bare possibility? When it is asked, whether Agamemnon, Thersites, Hannibal, Nero, and every stupid clown, that ever existed in Italy, Scythia, Bactria, or Guinea, are now alive; can any man think, that a scrutiny of nature will furnish arguments strong enough to answer so strange a question in the affirmative? The want of argument, without revelation, sufficiently establishes the negative. Quanto facilius, says Pliny, certiusque sibi quemque credere, ac specimen securitatis antegenitali sumere experimento. Our insensibility, before the composition of the body, seems to natural reason a proof of a like state after dissolution.”
― David Hume, Essays

“In every system of morality, which I have hitherto met with, I have always remark’d, that the author proceeds for some time in the ordinary ways of reasoning, and establishes the being of a God, or makes observations concerning human affairs; when all of a sudden I am surpriz’d to find, that instead of the usual copulations of propositions, is, and is not, I meet with no proposition that is not connected with an ought, or an ought not. This change is imperceptible; but is however, of the last consequence. For as this ought, or ought not, expresses some new relation or affirmation, ‘tis necessary that it shou’d be observ’d and explain’d; and at the same time that a reason should be given; for what seems altogether inconceivable, how this new relation can be a deduction from others, which are entirely different from it.”
― David Hume, A Treatise of Human Nature

“Truth is of two kinds, consisting either in the discovery of the proportions of ideas, consider'd as such, or in the conformity of our ideas of objects to their real existence (Hume, 1739, p. 495).”
― David Hume

“There is a great difference between historical facts and speculative opinions ; nor is the knowledge of the one propagated in the same manner with that of the other”
― David Hume , The Natural History of Religion