What two ideas are more inseparable than beer and Britannia?

I look upon Switzerland as an inferior sort of Scotland.

Errors, to be dangerous, must have a great deal of truth mingled with them. It is only from this alliance that they can ever obtain an extensive circulation.

[T]he 47th proposition in Euclid might now be voted down with as much ease as any proposition in politics; and therefore if Lord Hawkesbury hates the abstract truths of science as much as he hates concrete truth in human affairs, now is his time for getting rid of the multiplication table, and passing a vote of censure upon the pretensions of the hypotenuse.

Lucy, dear child, mind your arithmetic. You know in the first sum of yours I ever saw there was a mistake. You had carried two (as a cab is licensed to do), and you ought, dear Lucy, to have carried but one. Is this a trifle? What would life be without arithmetic, but a scene of horrors.

When I hear any man talk of an unalterable law, the only effect it produces on me is to convince me that he is an unalterable fool

A man who wishes to make his way in life could do no better than go through the world with a boiling tea-kettle in his hand.