Fame has eagle wings, and yet she mounts not so high as man's desires.

The fruit of my tree of knowledge is plucked, and it is this: “Adventures are to the adventurous.”

The care of the public health is the first duty of the statesman.

No enemy is indeed so terrible as a man of genius.

Cosmopolitan critics, men who are the friends of every country save their own.

Change is inevitable. Change is constant.

Some will read only old books, as if there were no valuable truths to be discovered in modern publications: others will only read new books, as if some valuable truths are not among the old. Some will not read a book because they know the author: others . . . would also read the man.