The laws are adapted to those cases which most frequently occur

In case of doubt it is best to lean to the side of mercy.

No man can give what he has not

No man can make another a debtor against his will

That is sufficiently certain which can be made certain

A promise against law or duty is void in its own nature

A public right cannot be changed by private agreement

Every innovation occasions more harm and and derangement of order by its novelty, than benefit by its abstract utility

Every skilled person is to be believed with reference to his own art

The partner of my partner is not my partner