That a man be willing, when others are so too, as far forth as for peace and defense of himself he shall think it necessary, to lay down this right to all things and be contented with so much liberty against other men, as he would allow other men against himself. – Thomas Hobbes
The right of nature… is the liberty each man hath to use his own power, as he will himself, for the preservation of his own nature that is to say, of his own life. – Thomas Hobbes