“Jiry, don't worry about anything. Go out and have a good time.”
Source: No Ordinary Genius (1994), p. 252, last words to his artist friend Jirayr Zorthian, as recalled by Zorthian in "No Ordinary Genius" (1993): video http://www.youtube.com/watch?v=Fzg1CU8t9nw&t=1h33m22s
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Richard Feynman 181
American theoretical physicist 1918–1988Related quotes

“Don't worry about anything. Just do what you can and be the best you can be.”
In response to David Winer http://scripting.wordpress.com/2006/12/21/scripting-news-for-12212006/
“Don't worry about it. The right thing will come at the right time.”
Source: Until the End of Time

From Yogi: The Autobiography of a Professional Baseball Player; reproduced in "Berra Dispels Li'l Abner Myth."

(Don't Worry) If There's a Hell Below, from Curtis (1970).
Song lyrics

Willie Nelson On Eggs, Martial Arts & Living A Life Without Worry, Southern Living, Lifestyle Network, January 2017, February 22, 2017 http://www.southernliving.com/culture/celebrities/willie-nelson-interview-video,