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Necessity may be defined in two ways, conformably to the two definitions of cause, of which it makes an essential part. It consists either in the constant conjunction of like objects, or in the inference of the understating from one object to another.

— David Hume An Enquiry Concerning Human Understanding (1748)

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More quotes by David Hume

Be a philosopher; but, amidst all your philosophy, be still a man.

An Enquiry Concerning Human Understanding (1748)

Beauty is no quality in things themselves: It exists merely in the mind which contemplates them; and each mind perceives a different beauty.

Essays, Moral, Political, and Literary (1741)

It is a great mortification to the vanity of man, that his utmost art and industry can never equal the meanest of nature's productions, either for beauty or value.

Essays, Moral, Political, and Literary (1741)

Where ambition can be so happy as to cover its enterprizes, even to the person himself, under the appearance of principle, it is the most incurable and inflexible of all human passions.

The History of England (1754)

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.

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