The first question concerning the Celestial Bodies is whether there be a system, that is whether the world or universe compose together one globe, with a center, or whether the particular globes of earth and stars be scattered dispersedly, each on its own roots, without any system or common center.

If money be not thy servant, it will be thy master.

As the births of living creatures at first are ill-shapen, so are all innovations, which are the births of time.

Again there is another great and powerful cause why the sciences have made but little progress; which is this. It is not possible to run a course aright when the goal itself has not been rightly placed.

People prefer to believe what they want to be true.

There is nothing more certain in nature than that it is impossible for any body to be utterly annihilated.

The errors of young men are the ruin of business, but the errors of aged men amount to this, that more might have been done, or sooner.