Almost all rich veins of original and striking speculation have been opened by systematic half-thinkers.

There is always hope when people are forced to listen to both sides.

The beliefs which we have most warrant for, have no safeguard to rest on, but a standing invitation to the whole world to prove them unfounded.

To do as one would be done by, and to love one's neighbour as oneself, constitute the ideal perfection of utilitarian morality

A general State education is a mere contrivance for moulding people to be exactly like one another, and as the mould in which it casts them is that which pleases the dominant power in the government.

When the land is cultivated entirely by the spade and no horses are kept, a cow is kept for every three acres of land.

The application of algebra to geometry ... has immortalized the name of Descartes, and constitutes the greatest single step ever made in the progress of the exact sciences.