Spirituality lies in regarding existence merely as a vehicle for contemplation, and contemplation merely a vehicle for joy.

Imagination is potentially infinite. Though actually we are limited to the types of experience for which we possess organs, those organs are somewhat plastic. Opportunity will change their scope and even their center.

That fear first created the gods is perhaps as true as anything so brief could be on so great a subject.

Religious doctrines would do well to withdraw their pretension to be dealing with matters of fact. That pretension is not only the source of the conflicts of religion with science and the vain and bitter controversies of sects; it is also the cause of the impurity and incoherence of religion in the soul.

Reason in my philosophy is only a harmony among irrational impulses.

To knock a thing down, especially if it is cocked at an arrogant angle, is a deep delight of the blood.

The line between what is known scientifically and what has to be assumed in order to support knowledge is impossible to draw. Memory itself is an internal rumour.