How little has situation to do with happiness. The happy individual uses their intelligence to realise things could be worse and therefore is grateful and happy. The unhappy individual does the opposite!
Fanny BurneyWhen young people are too rigidly sequestered from [the world], their lively and romantic imaginations paint it to them as a paradise of which they have been beguiled; but when they are shown it properly, and in due time, they see it such as it really is, equally shared by pain and pleasure, hope and disappointment.
Fanny Burney