Thomas Hobbes

“ For seeing that by nature every man hath right to every thing, it is impossible for a man to transfer unto another any right that he had not before. And therefore all that a man doth in transferring of right, is no more but a declaring of the will, to suffer him, to whom he hath so transferred his right, to make benefit of the same, without molestation. As for example, when a man giveth his land or goods to another, he taketh from himself the right to enter into, and make use of the said land or goods, or otherwise to hinder him of the use of what he hath given. ”

“ When a man transferreth any right of his to another, without consideration of reciprocal benefit, past, present, or to come; this is called FREE GIFT. And in free gift no other words can be binding, but those which are de praesenti, or de praeterito: for being de futuro only, they transfer nothing, nor can they be understood, as if they proceeded from the will of the giver; because being a free gift, it carrieth with it no obligation greater than that which is enforced by the words. ”

“ For though all men may know by nature, that there is an Almighty power, nevertheless they believe not, that they swear by him, in any other form or name, than what their own (which they think the true) religion teacheth them.
17. And by the definition of an oath, it appeareth that it addeth not a greater obligation to perform the covenant sworn, than the covenant carrieth in itself, but it putteth a man into a greater danger, and of greater punishment. ”

“ One precept of the law of nature therefore is this, that every man divest himself of the right he hath to all things by nature. For when divers men have right not only to all things else, but to one another's persons, if they use the same, there ariseth thereby invasion on the one part, and resistance on the other, which is war; and therefore contrary to the law of nature, the sun whereof consisteth in making peace. ”

“ And seeing men cannot be afraid of the power they believe not, and an oath is to no purpose, without fear of him they swear by; it is necessary that he that sweareth, do it in that form which himself admitteth in his own religion, and not in that form which he useth, that putteth him to the oath. ”

“ When a man divesteth and putteth from himself his right, he either simply relinquisheth it, or transferreth the same to another man. To RELINQUISH it, is by sufficient signs to declare, that it is his will no more to do that action, which of right he might have done before. To TRANSFER right to another, is by sufficient signs to declare to that other accepting thereof, that it is his will not to resist, or hinder him, according to that right he had thereto before he transferred it. ”

“ For he that promiseth to give, without any other consideration but his own affection, so long as he hath not given, deliberateth still, according as the causes of his affections continue or diminish; and he that deliberateth hath not yet willed, because the will is the last act of his deliberation. ”

“ When there appear no other signs that a man hath relinquished, or transferred his right, but only words; it behoveth that the same be done in words, that signify the present time, or the time past, and not only the time to come. ”

“ The intention therefore of an oath being to provoke vengeance upon the breakers of covenants; it is to no purpose to swear by men, be they never so great, because their punishment by divers accidents may be avoided, whether they will, or no ”