“Hate must make a person productive; otherwise one might as well love.”
Half-Truths and One-And-A-Half Truths (1976)
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Karl Kraus 94
Czech playwright and publicist 1874–1936Related quotes

1990s, Long Walk to Freedom (1995)

https://twitter.com/BarackObama/status/896523357272911872 Speaking via twitter on August 13, 2017 in response to the 2017 Unite the Right rally in harlottesville, Virginia and quoting Nelson Mandela. Archived via Wayback Machine on August 14, 2017 https://web.archive.org/web/20170814133749/https:/twitter.com/BarackObama/status/896523357272911872. Source: Bipartisan condemnation for 'Unite the Right' rally by CNN's Jennifer Hansler on August 13, 2017 http://edition.cnn.com/2017/08/12/politics/parties-condemn-white-nationalist-rally/index.html. Archived via Wayback Machine on August 14, 2017 https://web.archive.org/web/20170814134330/http://edition.cnn.com/2017/08/12/politics/parties-condemn-white-nationalist-rally/index.html.
2017
Variant: Madiba reminds us that: “No one is born hating another person because of the color of his skin, or his background, or his religion. People must learn to hate, and if they can learn to hate, they can be taught to love, for love comes more naturally to the human heart.”

“You might as well make yourself fly as to make yourself love.”
Source: My Story

“Grief at the absence of a loved one is happiness compared to life with a person one hates.”
Regretter ce que l'on aime est un bien, en comparaison de vivre avec ce que l'on hait.
Aphorism 40
Les Caractères (1688), Du Coeur

Transhumanism (1957)
Context: The personality may grievously fail in attaining any real wholeness. One thing is certain, that the well-developed, well-integrated personality is the highest product of evolution, the fullest realization we know of in the universe.

1950s, Loving Your Enemies (Christmas 1957)
Context: Another reason why we must love our enemies is that hate scars the soul and distorts the personality. Mindful that hate is an evil and dangerous force, we too often think of what it does to the person hated. This is understandable, for hate bring irreparable damage to its victims. We have seen its ugly consequences in the ignominious deaths brought to six million Jews by a hate-obsessed madman named Hitler, in the unspeakable violence inflicted upon Negroes by blood-thirsty mobs, in the dark horrors of war, and in the terrible indignities and injustices perpetrated against millions of God's children by unconscionable oppressors.
But there is another side which we must never overlook. Hate is just as injurious to the person who hates. Like an unchecked cancer, hate corrodes the personality and eats away its vital unity. Hate destroys a man's sense of values and his objectivity. It causes him to describe the beautiful as ugly and the ugly as beautiful, and to confuse the true with the false and the false with the true.

“A soldier's first duty is to obey, otherwise you might as well do away with soldiering.”
To Leon Goldensohn, February 4, 1946, from "The Nuremberg Interviews" by Leon Goldensohn, Robert Gellately - History - 2004 - Page 322.