Life is striving

We should see the will express itself here in the lowest grade as blind striving, an obscure, inarticulate impulse, far from susceptible of being directly known. It is the simplest and the weakest mode of its objectification. But it appears as this blind and unconscious striving in the whole of unorganised nature, in all those original forces of which it is the work of physics and chemistry to discover and to study the laws, and each of which manifests itself to us in millions of phenomena which are exactly similar and regular, and show no trace of individual character, but are mere multiplicity through space and time, i.e., through the principium individuationis, as a picture is multiplied through the facets of a glass.

https://en.wikisource.org/wiki/The_World_as_Will_and_Representation/Second_Book