“Humans: The only animal who can laugh!/ We can enjoy the lighter side of life/ And we can also laugh at others/ And ridicule others!”

1840s, Heroes and Hero-Worship (1840), The Hero as Poet

Source: Animal, Vegetable, Miracle: A Year of Food Life

As It Is: Simply To See (p.199)
Straw Dogs: Thoughts on Humans and Other Animals (2002)

Source: Disturbing the Peace (1986), Ch. 2 : Writing for the Stage

15
1940s–present, Minority Report : H.L. Mencken's Notebooks (1956)
Context: Human life is basically a comedy. Even its tragedies often seem comic to the spectator, and not infrequently they actually have comic touches to the victim. Happiness probably consists largely in the capacity to detect and relish them. A man who can laugh, if only at himself, is never really miserable.

Source: The Darkest Seduction

Address upon receiving the Open Society Prize awarded by Central European University (24 June 1999) http://old.hrad.cz/president/Havel/speeches/1999/2406_uk.html
Variant translation: There are no exact directions. There are probably no directions at all. The only things that I am able to recommend at this moment are: a sense of humour; an ability to see the ridiculous and the absurd dimensions of things; an ability to laugh about others as well as about ourselves; a sense of irony; and, of everything that invites parody in this world. In other words: rising above things, or looking at them from a distance; sensibility to the hidden presence of all the more dangerous types of conceit in others, as well as in ourselves; good cheer; an unostentatious certainty of the meaning of things; gratitude for the gift of life and courage to assume responsibility for it; and, a vigilant mind.
Those who have not lost the ability to recognize that which is laughable in themselves, or their own nothingness, are not arrogant, nor are they enemies of an Open Society. Its enemy is a person with a fiercely serious countenance and burning eyes.
Context: There are no exact guidelines. There are probably no guidelines at all. The only thing I can recommend at this stage is a sense of humor, an ability to see things in their ridiculous and absurd dimensions, to laugh at others and at ourselves, a sense of irony regarding everything that calls out for parody in this world. In other words, I can only recommend perspective and distance. Awareness of all the most dangerous kinds of vanity, both in others and in ourselves. A good mind. A modest certainty about the meaning of things. Gratitude for the gift of life and the courage to take responsibility for it. Vigilance of spirit.