Every man's affairs, however little, are important to himself.

Nay, Madam, when you are declaiming, declaim; and when you are calculating, calculate.

We never do anything consciously for the last time without sadness of heart.

Leisure and curiosity might soon make great advances in useful knowledge, were they not diverted by minute emulation and laborious trifles.

Every cold empirick, when his heart is expanded by a successful experiment, swells into a theorist.

No estimate is more in danger of erroneous calculations than those by which a man computes the force of his own genius.

Just praise is only a debt, but flattery is a present.