Is there any proverb or idiom that conveys this meaning:" the world is not loyal to man, 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 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)