It also happened to be the first rule of life.

Nature needs balance, it is a basic rule of life.

If this was his rule of life, should it not also be ours?

Take what you want, kill your opponent, that is the only rule of life.

Kill and be killed, that is the rule of life.

Isabella made up the rules of life as she went along.

They follow a certain rule of life but contract no religious obligations.

Those strategies failed to respect the basic rules of economic life.

"But there are some fundamental rules of life that people here live by," he added.

The rules of life may be different on this new world.