Appropriation, together with perception and orientation, is the third process which occurs when man relates to nature. In its most general sense, ‘appropriation’ means to utilize constructively, to build by incorporating; the subject, whether stated or implied, is man's essential powers. For Marx, the individual appropriates the nature he perceives and has become oriented to by making it in some way a part of himself with whatever effect this has on his senses and future orientation. To ‘capture’ a sunset, it is not necessary to paint, write or sing about it. It becomes ours in the experiencing of it. The forms and colors we see, the sense of awakening to beauty that we feel and the growth in sensitivity which accompanies such an event are all indications of our new appropriation. To paint the sunset, or to write or sing about it, if joined by genuine emotions, would achieve an even higher degree of appropriation, would make this event even more a part of us.

If the appropriation is a significant one, it may increase our appreciation for beauty to such an extent that we now regard the whole of nature in a new way. Nuances of color, light and shape, which were formerly missed, have become striking objects of attention. Orientation, too, is affected as some things assume new or broader meanings depending on which of our fires has been kindled.