“A mind at peace a mind centered and not focused on harming others is stronger than any physical force in the universe.”
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Wayne W. Dyer 92
American writer 1940–2015Related quotes

“The observing mind is not a physical system, it cannot interact with any physical system.”
Nature and the Greeks (1954)
Context: The observing mind is not a physical system, it cannot interact with any physical system. And it might be better to reserve the term "subject" for the observing mind. … For the subject, if anything, is the thing that senses and thinks. Sensations and thoughts do not belong to the "world of energy."

“I have always believed that exercise is the key not only to physical health but to peace of mind.”
1990s, Long Walk to Freedom (1995)

Bk. 3, Ch. 4
Little, Big: or, The Fairies' Parliament (1981)
Context: The immense laughter of Bruno when he understood that Copernicus had inverted the universe — what was it but joy in the confirmation of his knowledge that Mind, in the center of all, contains within it all that it is the center of? … the Universe exploded into infinitude, a circle of which Mind, the center, was everywhere and the circumference nowhere. The trick-mirror of finitude was smashed, Bruno laughed, the starry realms were a jewelled bracelet in the hand.
'Excerpts from the Teaching of Hans Hofmann', p. 61
Search for the Real and Other Essays (1948)
“Peace of mind comes from not wanting to change others.”
Source: Love Is Letting Go of Fear

As quoted in "How ‘Mulan’s’ Tzi Ma Became Hollywood’s Go-To Asian Dad (Watch)" in Variety (4 September 2020) https://variety.com/2020/film/news/tzi-ma-mulan-hollywood-career-1234758692/