Fame and tranquility can never be bedfellows.

Those sciences which govern the morals of mankind, such as Theology and Philosophy, make everything their concern: no activity is so private or so secret as to escape their attention or their jurisdiction.

But as Nature is the best guide, teaching must be the development of natural inclinations, for which purpose the teacher must watch his pupil and listen to him, not continually bawl words into his ears as if pouring water into a funnel. Good teaching will come from a mind well made rather than well filled.

The relish of good and evil depends in a great measure upon the opinion we have of them.

Nature has made us a present of a broad capacity for entertaining ourselves apart, and often calls us to do so, to teach us that we owe ourselves in part to society, but in the best part to ourselves.

Don't be afraid to say what you are not afraid to think

Even in the midst of compassion we feel within I know not what tart sweet titillation of malicious pleasure in seeing others suffer; children have the same feeling.