
“Love is the master key that opens the gates of happiness.”
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.
“Love is the master key that opens the gates of happiness.”
“He would rather burst a city gate than find it open to admit him.”
Non tam portas intrare patentis
quam fregisse juvat.
Book II, line 443 (tr. J. D. Duff).
Pharsalia
A Mortal Antipathy (1885) This statement is often misquoted as "Love is the master-key that opens the gates of happiness".
Source: Light on Life: The Yoga Journey to Wholeness, Inner Peace, and Ultimate Freedom, p. 48
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?
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.
Source: La poétique de la rêverie (The Poetics of Reverie) (1960), Ch. 2, sect. 3
Source: Light on Life: The Yoga Journey to Wholeness, Inner Peace, and Ultimate Freedom, p. 22-23