Meaning of the word "hope is a good breakfast, but it is a bad supper" in English

What does "hope is a good breakfast, but it is a bad supper" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

hope is a good breakfast, but it is a bad supper

US /hoʊp ɪz ə ɡʊd ˈbrɛkfəst, bʌt ɪt ɪz ə bæd ˈsʌpər/
UK /həʊp ɪz ə ɡʊd ˈbrɛkfəst, bʌt ɪt ɪz ə bæd ˈsʌpə/
"hope is a good breakfast, but it is a bad supper" picture

Idiom

it is good to start the day or a project with hope, but if hope is all you have left at the end without achievement, it is disappointing

Example:
You need a real plan for your business because hope is a good breakfast, but it is a bad supper.
Relying solely on luck won't sustain you; remember that hope is a good breakfast, but it is a bad supper.