Only humans can set aims and achieve them by their activities if they know the laws of nature and set up various processes based on them and organise them purposively.
Rein Vihalemm, “Chemistry as an Interesting Subject for the Philosophy of Science,” Estonian Studies in the History and Philosophy of Science, Rein Vihalemm, ed., Dordrecht / Boston / London: Kluwer Academic Publishers, 2001, p. 192.