Weakness, fear, melancholy, together with ignorance, are the true sources of superstition. Hope, pride, presumption, a warm indignation, together with ignorance, are the true sources of enthusiasm.

What praise is implied in the simple epithet useful! What reproach in the contrary.

... superstitions, which, being unable to defend themselves on fair ground, raise these intangling brambles to cover and protect their weakness. Chased from the open country, these robbers fly into the forest, and lie in wait to break in upon every unguarded avenue of the mind, and overwhelm it with religious fears and prejudices. ... The idea of God, as meaning an infinitely intelligent, wise and good Being, arises from reflecting on the operations of our own mind, and augmenting, without limit, those qualities of goodness and wisdom.

The law always limits every power it gives.

But I would still reply, that the knavery and folly of men are such common phenomena, that I should rather believe the most extraordinary events to arise from their concurrence, than admit of so signal a violation of the laws of nature

No advantages in this world are pure and unmixed.

The many instances of forged miracles, and prophecies, and supernatural events, which, in all ages, have either been detected by contrary evidence, or which detect themselves by their absurdity, prove sufficiently the strong propensity of mankind to the extraordinary and marvellous, and ought reasonably to begat a suspicion against all relations of this kind.