In studying the ways of creation, we must remember that everything evolves from one ultimate source - the Torah. The Torah is the inner essence of all worldly matters. Creation is a mere manifestation - a reflection of the true essence, the Torah.
The Torah is the Universe's source. It is not like a blueprint that can be discarded once the construction is finished and the structure stands on its own; it is not like an idea that, after it has been actualize, can be forgotten.