"Know that nothing that exists remains in a state of repose—that is, all things are in motion."

"KNOW THAT NOTHING that exists remains in a state of repose—that is, all things are in motion. They are either growing or declining, either coming from non-existence into existence or passing from existence into non-existence. So this flower, this hyacinth, was for a time coming from non-existence into existence and is now passing from existence into non-existence. This is called essential or natural motion, and it can in no wise be dissociated from created things, for it is one of their essential requirements, just as it is an essential requirement of fire to burn."

‘Abdu’l-Bahá, Some Answered Questions