Jesus never instructed men to do what was right because it was right; yet this is the true reason why they should do it.

For everybody has a natural right not only to defend his own person and property against aggressors, but also to go to the assistance and defence of everybody else, whose person or property is invaded. The natural right of each individual to defend his own person and property against an aggressor, and to go to the assistance and defence of every one else whose person or property is invaded, is a right without which men could not exist on earth.

There is not, in the Constitution, a syllable that implies that persons, born within the territorial limits of the United States, have allegiance imposed upon them on account of their birth in the country, or that they will be judged by any different rule, on the subject of treason, than persons of foreign birth.

The highwayman takes solely upon himself the responsibility, danger, and crime of his own act. He does not pretend that he has any rightful claim to your money, or that he intends to use it for your own benefit ... Furthermore, having taken your money, he leaves you, as you wish him to do ... He does not keep "protecting" you by commanding you to bow down and serve him; by requiring you to do this, and forbidding you to do that.

The right of absolute and irresponsible dominion is the right of property, and the right of property is the right of absolute, irresponsible dominion. The two are identical; the one necessarily implying the other.

Man, no doubt, owes many other moral duties to his fellow men; such as to feed the hungry, clothe the naked, shelter the homeless, care for the sick, protect the defenseless, assist the weak, and enlighten the ignorant. But these are simply moral duties, of which each man must be his own judge, in each particular case, as to whether, and how, and how far, he can, or will perform them.

The very idea of law originates in men's natural rights. There is no other standard, than natural rights, by which civil law can be measured. Law has always been the name of that rule or principle of justice, which protects those rights. Thus we speak of natural law.