That they characteristically produce their environments, and that they would do so, even were they not under the burden of 'physical need' - indeed, they will produce the 'whole of [their] nature', and may even create 'in accordance with the laws of beauty'. Perhaps most importantly, though, their creativity, their production is purposive and planned. Humans, then, make plans for their future activity, and attempt to exercise their production (even lives) according to them.