Meaning of the word "all is for the best in the best of all possible worlds" in English

What does "all is for the best in the best of all possible worlds" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

all is for the best in the best of all possible worlds

US /ɔːl ɪz fɔːr ðə bɛst ɪn ðə bɛst əv ɔːl ˈpɑːsəbl wɜːrldz/
UK /ɔːl ɪz fɔː ðə bɛst ɪn ðə bɛst əv ɔːl ˈpɒsəbl wɜːldz/
"all is for the best in the best of all possible worlds" picture

Idiom

an optimistic belief that everything happens for a good reason and that the current situation is the most favorable one possible

Example:
Even after losing his job, he maintained that all is for the best in the best of all possible worlds.
Her blind optimism makes her believe that all is for the best in the best of all possible worlds.