Oliver Wendell Holmes (1809–1894) Poet, essayist, physician
A Mortal Antipathy (1885) This statement is often misquoted as "Love is the master-key that opens the gates of happiness".
Oliver Wendell Holmes (1809–1894) Poet, essayist, physician
A Mortal Antipathy (1885) This statement is often misquoted as "Love is the master-key that opens the gates of happiness".
Sri Aurobindo (1872–1950) Indian nationalist, freedom fighter, philosopher, yogi, guru and poet
Thoughts and Aphorisms (1913), Bhakti
Albert Schweitzer (1875–1965) French-German physician, theologian, musician and philosopher
Variant: Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
Maimónides book The Guide for the Perplexed
Guide for the Perplexed (c. 1190), Introduction
Context: Having concluded these introductory remarks I proceed to examine those expressions, to the true meaning of which, as apparent from the context, it is necessary to direct your attention. This book will then be a key admitting to places the gates of which would otherwise be closed. When the gates are opened and men enter, their souls will enjoy repose, their eyes will be gratified, and even their bodies, after all toil and labour, will be refreshed.
Alireza Kohany (1993) Musician, Actor, Entrepreneur
Source: https://www.google.com/books/edition/What_Is_E_Commerce/PkPhDwAAQBAJ
Ernst Ruska (1906–1988) German physicist
Das Lichtmikroskop öffnete das erste Tor zum Mikrokosmos. Das Elektronenmikroskop öffnete das zweite Tor zum Mikrokosmos. Was werden wir finden wenn wir das dritte Tor öffnen? <br class="br">as quoted by Nan Yao, director of the Imaging and Analysis Center at the Princeton Materials Institute, in the Princeton Weekly Bulletin, February 26, 2001, Vol. 90, No. 18 http://www.princeton.edu/~iac/pwb2_26b.html.