When a person enters a factory that functions without any human intervention, he is aware of a central mechanism that controls all the machines, keeping them synchronized. In fact, the very scarcity of the "human factor" testifies to the superlative quality of the central control mechanism.

Since this applies to a factory and its myriad details, it is even more applicable in the world of finite matter. If one contemplates any aspect of inanimate existence, for instance a stone, piece of wood or bit of vegetation, he will acknowledge it as an exceedingly complex creation.

Every object consists of billions of atoms. Each atom, in turn, consists of many tiny particles. Although this complexity would seem to create a tremendous amount of chaos, the subatomic world is actually a highly organized and structured realm in which components exist harmoniously. Moreover, when one considers the symmetry between the microcosmic and macrocosmic aspects of the universe, such as the many parallels between a human being and the world he inhabits, it becomes clear that there is a central power responsible for the intricate order of the universe.

Igros Kodesh of the Rebbe, Vol. 18, p. 391