Henry David Thoreau Ethics Quotations

Mathematics should be mixed not only with physics but with ethics.

You cannot receive a shock unless you have an electric affinity for that which shocks you.

What is morality but immemorial custom? Conscience is the chief of conservatives.

The study of geometry is a petty and idle exercise of the mind, if it is applied to no larger system than the starry one. Mathematics should be mixed not only with physics but with ethics; that is mixed mathematics.