Is there any proverb or idiom that conveys this meaning:" **Don't rely on this world, since it is not loyal to man forever, today is in your hand, tomorrow in mine"** ( actually it is a Persian saying and it implies that money, position, properties, power,...  are not stable or eternal, so don't bond to /don't rely on this worldly world and just act and live humanly).

For examples:  The dictators In other countries ,should learn a serious lesson from what happened to Gaddafi: the world is bound to no man and the six feet of earth make all men equal. 


( I found this Jewish proverb, "**the world is bound to no man"**, but I'm not sure if it is used by English speakers or not)