“All warfare is based on deception. Hence, when we are able to attack, we must seem unable; when using our forces, we must appear inactive; when we are near, we must make the enemy believe we are far away; when far away, we must make him believe we are near.”
Variant translations
A military operation involves deception. Even though you are competent, appear to be incompetent. Though effective, appear to be ineffective.
Source: The Art of War, Chapter I · Detail Assessment and Planning
Original
兵者,詭道也。故能而示之不能,用而示之不用,近而示之遠,遠而示之近,
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Sun Tzu 68
ancient Chinese military general, strategist and philosophe… -543–-495 BCRelated quotes

“We must suffer to the end, to the moment when we stop believing in suffering.”
The Trouble With Being Born (1973)

'T is sweet to think.
Bartlett's Familiar Quotations, 10th ed. (1919)

Speaking as the Director of USIA, in testimony before a Congressional Committee (May 1963) http://pdaa.publicdiplomacy.org/?page_id=6
Context: American traditions and the American ethic require us to be truthful, but the most important reason is that truth is the best propaganda and lies are the worst. To be persuasive we must be believable; to be believable we must be credible; to be credible we must be truthful. It is as simple as that.

1950s, Loving Your Enemies (November 1957)
Variant: We must discover the power of love, the power, the redemptive power of love. And when we discover that we will be able to make of this old world a new world. We will be able to make men better. Love is the only way.
Context: But there is another way. And that is to organize mass non-violent resistance based on the principle of love. It seems to me that this is the only way as our eyes look to the future. As we look out across the years and across the generations, let us develop and move right here. We must discover the power of love, the power, the redemptive power of love. And when we discover that we will be able to make of this old world a new world. We will be able to make men better. Love is the only way.

Source: https://www.youtube.com/watch?v=xiLR4sCgvnc
Context: But now, let’s give each other a chance.
It’s time to put away the harsh rhetoric.
To lower the temperature.
To see each other again.
To listen to each other again.
To make progress, we must stop treating our opponents as our enemy.
We are not enemies. We are Americans.