And hence it is, that he who attempts to get another man into his absolute power, does thereby put himself into a state of war with him; it being to be understood as a declaration of a design upon his life: for I have reason to conclude, that he who would get me into his power without my consent, would use me as he pleased when he had got me there, and destroy me too when he had a fancy to it; for no body can desire to have me in his absolute power, unless it be to compel me by force to that which is against the right of my freedom, i.e. make me a slave.
He that, in the state of nature, would take away the freedom that belongs to any one in that state, must necessarily be supposed to have a design to take away every thing else, that freedom being the foundation of all the rest; as he that, in the state of society, would take away the freedom belonging to those of that society or commonwealth, must be supposed to design to take away from them every thing else, and so be looked on as in a state of war.
[F]or where-ever violence is used, and injury done, though by hands appointed to administer justice, it is still violence and injury, however coloured with the name, pretences, or forms of law, the end whereof being to protect and redress the innocent, by an unbiased application of it, to all who are under it; wherever that is not bona fide done, war is made upon the sufferers, who having no appeal on earth to right them, they are left to the only remedy in such cases, an appeal to heaven.
The natural liberty of man is to be free from any superior power on earth, and not to be under the will or legislative authority of man, but to have only the law of nature for his rule. The liberty of man, in society, is to be under no other legislative power, but that established, by consent, in the commonwealth; nor under the dominion of any will, or restraint of any law, but what that legislative shall enact, according to the trust put in it.

Popular pages: Locke's Second Treatise on Civil Government