He who truly knows has no occasion to shout.

Art is the queen of all sciences communicating knowledge to all the generations of the world.

Nothing strengthens authority so much as silence.

Just as eating against one's will is injurious to health, so studying without a liking for it spoils the memory, and it retains nothing it takes in.

One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.

The natural desire of good men is knowledge.

Obstacles cannot bend me. Every obstacle yields to effort.