It is easier to contend with evil at the first than at the last.

While I thought that I was learning how to live, I have been learning how to die.

We, by our arts may be called the grandsons of God.

A bird maintains itself in the air by imperceptible balancing, when near to the mountains or lofty ocean crags; it does this by means of the curves of the winds which as they strike against these projections, being forced to preserve their first impetus bend their straight course towards the sky with divers revolutions, at the beginning of which the birds come to a stop with their wings open, receiving underneath themselves the continual buffetings of the reflex courses of the winds.

I am not to blame for putting forward, in the course of my work on science, any general rule derived from a previous conclusion.

Learning is the only thing that never disappoints us.

He who wishes to be rich in a day will be hanged in a year.