Anonymous, A Letter to Adam Smith LL.D. on the Life… (1777)
“ 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. That the universe is nothing but a heap of perceptions, without a substance. That though a man could bring himself to believe, yea, and have reason to believe, that every thing in the universe proceeds from some cause; yet it would be unreasonable for him to believe, that the universe itself proceeds from a cause. ”
