A person who has great wealth will still be unhappy if he hasn’t also mastered gratitude! — Zelig Pliskin
Show me one couple unhappy merely on account of their limited circumstances, — Samuel Taylor Coleridge
The happy should not insist too much upon their happiness in the presence of the unhappy. — Henry Wadsworth Longfellow
We are more unhappy to see people ahead of us than happy to see people behind us. — Michel de Montaigne
The man whom no one pleases is much more unhappy than the man who pleases no one. — François de La Rochefoucauld
To make others less happy is a crime. To make ourselves unhappy is where all crime starts. — Roger Ebert