"Observe constantly that all things take place by change, and accustom thyself to consider that the nature of the Universe loves nothing so much as to change the things which are, and to make new things like them." -Marcus Aurelius
Change is constantly a factor of any life or substance. Even time progresses and is something of a mystery to those who invented it. The forces driving our Universe however are constant, as the knowledge and presence of the One who created it.