A calculating engine is one of the most intricate forms of mechanism, a telegraph key one of the simplest. But compare their value.

A calculating engine is one of the most intricate forms of mechanism, a telegraph key one of the simplest. But compare their value.

Doubt is the beginning, not the end, of wisdom.

Boundaries which mark off one field of science from another are purely artificial, are set up only for temporary convenience. Let chemists and physicists dig deep enough, and they reach common ground.

When a learner, in the fullness of his powers, comes to great truths unstaled by premature familiarity, he rejoices in the lateness of his lessons.

Let truth be a banner big enough to hide the man who holds it up.

Error held as truth has much the effect of truth. In politics and religion this fact upsets many confident predictions.