or An Essay on the Right of Authors and Inventors to a Perpetual Property in their IdeasSECTION XII. Objection Twelfth. It is said that a man, by giving his ideas to others, does not thereby part with them himself, nor lose the use of them, as in the case of material property; that he only adds to other men's wealth, without diminishing his own; that his giving knowledge to other men is only lighting their candles by his, thereby giving them the benefit of light, without any loss of light to himself; and that therefore he should not be allowed any exclusive property in his ideas, nor any right to demand a price for that, which it is no loss to him to give to others. This objection is really the same as the next preceding one; and is only stated in a different form. The answers given to that objection, will apply with equal force to this. The fallacy of both objections consist, primarily, in this—that they deny the fundamental principle, on which all rights of property are found...