Though the water running in the fountain be every ones, yet who can doubt, but that in the pitcher is his only who drew it out?

For a man's property is not at all secure, though there be good and equitable laws to set the bounds of it, between him and his fellow subjects, if he who commands those subjects, have power to take from any private man, what part he pleases of his property, and use and dispose of it as he thinks good.

As children's inquiries are not to be slighted, so also great care is to be taken, that they never receive deceitful and illuding answers. They easily perceive when they are slighted or deceived, and quickly learn the trick of neglect, dissimulation, and falsehood, which they observe others to make use of. We are not to intrench upon truth in any conversation, but least of all with children; since, if we play false with them, we not only deceive their expectation, and hinder their knowledge, but corrupt their innocence, and teach them the worst of vices.

If by gaining knowledge we destroy our health, we labour for a thing that will be useless in our hands.

The mind is furnished with ideas by experience alone

If punishment reaches not the mind and makes not the will supple, it hardens the offender.

That which parents should take care of... is to distinguish between the wants of fancy, and those of nature.