"The truth is that it is only when men cultivate the Earth skilfully, that it provides, in plenty, all that men need for the preservation of life, and still more for its higher development. Thus, when a man expends the activity of his mind and the strength of his body in procuring the goods of nature, he makes his own that part of nature's resources which he brings to completion, leaving on it, as it were, in some form, the imprint of himself. This being so, it cannot but be right for him that part as his very own, nor can it be lawful for anyone to violate that right in any way."
