Page:A Letter to Adam Smith on the Life, Death, and Philosophy of his friend David Hume (1777).djvu/54

 That in this soul is the agency of all the causes that operate throughout the sensible creation; and yet that in this soul there is neither power nor agency, nor any idea of either.

That matter and motion often be regarded as the cause of thought.

That the external world does not exist, or at least, that it's existence may reasonably be doubted.

That the universe exists in the mind, and that the mind does not exist.