In vain, therefore, should we pretend to determine any single event, or infer any cause or effect, without the assistance of observation and experien… - David Hume

The science of man is the only solid foundation for the other sciences. [All the other sciences] have a relation, greater or lesser, to human nature. ‘Tis impossible to tell what changes and improvements we might make in these sciences were we thoroughly acquainted with the extent and force of human understanding, and could explain the nature of the ideas we employ, and of the operations we perform in our reason.

What would become of history, had we not a dependence on the veracity of the historian, according to the experience, what we have had of mankind?

Beauty in things exists in the mind that contemplates them.