he who laughs last laughs longest

he who laughs ˌlast laughs ˈlongest

(saying) do not be too proud of your present success; in the end another person may be more successful than you: You think just because you’ve won this game, that means you’re the best player. Well, wait until the championship. Remember, he who laughs last laughs longest.
See also: he, last, laugh, long, who
Idioms browser ?
Full browser ?