Let not men think there is no truth, but in the sciences that they study, or the books that they read.

What worries you, masters you.

Words, in their primary or immediate signification, stand for nothing but the ideas in the mind of him who uses them.

The thoughts that come often unsought, and, as it were, drop into the mind, are commonly the most valuable of any we have.

Any one reflecting upon the thought he has of the delight, which any present or absent thing is apt to produce in him, has the idea we call love.

There is frequently more to be learned from the unexpected questions of a child than the discourses of men.

[Individuals] have a right to defend themselves and recover by force what by unlawful force is taken from them.