- James Smithson on Happiness
- Thomas Paine on Happiness
- Thomas Jefferson on Happiness
- Agnes Repplier on Happiness
- Immanuel Kant on Happiness
- Charles Spurgeon on Happiness
- Denis Waitley on Happiness
- George Porter on Happiness
- Max Planck on Happiness
- W. Somerset Maugham on Happiness
- Polly Toynbee on Happiness
- Dolley Madison on Happiness
- Jonathan Mayhew on Happiness
- Kin Hubbard on Happiness
- Desiderius Erasmus on Happiness
- Hugo Black on Happiness
- Sarah Orne Jewett on Happiness
- Elsie De Wolfe on Happiness
- Dalai Lama on Happiness
- Ashley Montagu on Happiness
- Robert Herrick on Happiness
- Barry Took on Happiness
- Herman Hesse on Happiness
- Robert Wyatt on Happiness
- Thomas Carlyle on Happiness
- Marguerite Duras on Happiness
- Adrian Grenier on Happiness
- Simon Travaglia on Happiness
- Miuccia Prada on Happiness
- Hilary Duff on Happiness
- Daniel Keys Moran on Happiness
- Kin Hubbard on Happiness
- Taraji P. Henson on Happiness