In whatever system where the weight attached to the wheel should be the cause of motion of the wheel, without any doubt the center of the gravity of the weight will stop beneath the center of its axle. No instrument devised by human ingenuity, which turns with its wheel, can remedy this effect. Oh, speculators about perpetual motion, how many vain chimeras have you created in the like quest. Go and take you place with the seekers after gold.

My body is not a tomb for animals.

When that which loves is united to the thing beloved it can rest there; when the burden is laid down it finds rest there. There will be eternal fame also for the inhabitants of that town, constructed and enlarged by him.

Of the four elements water is the second in weight and the second in respect of mobility. It is never at rest until it unites with the sea.

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

He who does not oppose evil......commands it to be done.

It is useful to constantly observe, note, and consider.