Perhaps pure reason without heart would never have thought of God.

It often takes more courage to change one's opinion than to stick to it.

The noble simplicity in the works of nature only too often originates in the noble shortsightedness of him who observes it.

Marriage, in contrast to the flu, starts with a fever and ends with the chills.

It is said that truth comes from the mouths of fools and children: I wish every good mind which feels an inclination for satire would reflect that the finest satirist always has something of both in him.

If we make a couple of discoveries here and there we need not believe things will go on like this for ever. Just as we hit water when we dig in the earth, so we discover the incomprehensible sooner or later.

One of our forefathers must have read a forbidden book.