Optimism is the madness of insisting that all is well when we are miserable.
Learn to cultivate your own garden.
If this is the best of possible worlds, what then are the others?
Optimism," said Cacambo, "What is that?" "Alas!" replied Candide, "It is the obstinacy of maintaining that everything is best when it is worst.
One day everything will be well, that is our hope. Everything's fine today, that is our illusion