“An unloving heart can no more understand a love-filled speaker than a German an Italian.”
Quoted in Karl An unloving heart can no more understand a love-filled speaker than a German an Italian Bihlmeyer, Heinrich Seuse. Deutsche Schriften, Stuttgart 1907, p. 199
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Henry Suso 22
Dominican friar and mystic 1295–1366Related quotes
As quoted at the Richard Carlson Memorial Website http://richardcarlson.com/

"Ninth Talk in Bombay, (14 March 1948) http://www.jkrishnamurti.com/krishnamurti-teachings/view-text.php?tid=270&chid=4600&w=%22What+brings+understanding+is+love%22, J.Krishnamurti Online, JKO Serial No. BO48Q1, published in The Collected Works, Vol. IV, p. 200
1940s
Context: What brings understanding is love. When your heart is full, then you will listen to the teacher, to the beggar, to the laughter of children, to the rainbow, and to the sorrow of man. Under every stone and leaf, that which is eternal exists. But we do not know how to look for it. Our minds and hearts are filled with other things than understanding of "what is". Love and mercy, kindliness and generosity do not cause enmity. When you love, you are very near truth. For, love makes for sensitivity, for vulnerability. That which is sensitive is capable of renewal. Then truth will come into being. It cannot come if your mind and heart are burdened, heavy with ignorance and animosity.

Habermas (1979) cited in: Werner Ulrich (1983) Critical heuristics of social planning. p. 123

“A heart can no more be forced to love than a stomach can be forced to digest food by persuasion.”

Source: Munich - Speech of April 12, 1922 https://archive.org/stream/TheSpeechesOfAdolfHitler19211941/hitler-speeches-collection_djvu.txt

“The valiant profit more
Their country, than the finest cleverest speakers.”
Truculentus, Act II, scene ii
Truculentus