If ... the past may be no Rule for the future, all Experience becomes useless and can give rise to no Inferences or Conclusions.

When I turn my eye inward, I find nothing but doubt and ignorance. All the world conspires to oppose and contradict me; though such is my weakness, that I feel all my opinions loosen and fall of themselves, when unsupported by the approbation of others.

The end of all moral speculations is to teach us our duty; and, by proper representations of the deformity of vice and beauty of virtue, beget correspondent habits, and engage us to avoid the one, and embrace the other.

Almost every one has a predominant inclination, to which his other desires and affections submit, and which governs him, though perhaps with some intervals, though the whole course of his life.

.. the voice of nature and experience seems plainly to oppose the selfish theory.

Of all the animals with which this globe is peopled, there is none towards whom nature seems, at first sight, to have exercised more cruelty than towards man, in the numberless wants and necessities with which she has loaded him, and in the slender means which she affords to the relieving these necessities.

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