Is there an idiom or maybe a proverb stating that things will not be the same or as you want, forever.
For example when telling someone that they might be in a good state or status now, but they will sure some day face difficulty or trouble (when they, for instance, feel so certain that they won't) more like warning, threatening or something.
A: He always bosses us around. We're really tired of that.
B: I know what you mean. He will face the consequences some day. Things will not always be as he wants (something to replace the last sentence in italic).