„The primary cause of unhappiness is never the situation but your thoughts about it.“
Variant: The primary cause of unhappiness is never the situation, but you thoughts about it. Be aware of the thoughts you are thinking.
Source: A New Earth: Awakening to Your Life's Purpose
Related quotes
„Remember that your thoughts are the primary cause of everything.“
— Rhonda Byrne, book The Secret
Source: The Secret

„Overthinking is the biggest cause of unhappiness.“
— Gautama Buddha philosopher, reformer and the founder of Buddhism -563 - -483 BC
„To think bad thoughts is really the easiest thing in the world. If you leave your mind to itself it will spiral down into ever-increasing unhappiness. To think good thoughts, however, requires effort. This is one of the things that discipline — training — is about.“
— James Clavell, book Shōgun
Source: Shōgun (1975), Ch. 5

„The Chinese used the intervals between things as the primary means of getting 'in touch' with situations.“
— Marshall McLuhan Canadian educator, philosopher, and scholar-- a professor of English literature, a literary critic, and a communicatio… 1911 - 1980
Source: 1980s, p. 77

„Even if it's deep unhappiness, it's your unhappiness.“
— Andrew Sullivan Journalist, writer, blogger 1963

„The nicest thing about feeling happy is that you think you'll never be unhappy again.“
— Manuel Puig Argentine author and screenwriter 1932 - 1990
Source: Kiss of the Spider Woman and Two Other Plays
„Unhappiness is caused when we cannot let go of our memories.“
— Jed Rubenfeld, The Interpretation of Murder
Source: The Interpretation of Murder

„I have been too unhappy, I thought, it cannot last, being so unhappy, it would kill you“
— Jean Rhys, Wide Sargasso Sea
Source: Wide Sargasso Sea

„Balance your thoughts with action. — If you spend too much time thinking about a thing, you'll never get it done.“
— Bruce Lee Hong Kong-American actor, martial artist, philosopher and filmmaker 1940 - 1973
Source: Striking Thoughts (2000), p. 43

„Only those are happy who never think or, rather, who only think about life's bare necessities, and to think about such things means not to think at all. True thinking resembles a demon who muddies the spring of life or a sickness which corrupts its roots. To think all the time, to raise questions, to doubt your own destiny, to feel the weariness of living, to be worn out to the point of exhaustion by thoughts and life, to leave behind you, as symbols of your life's drama, a trail of smoke and blood — all this means you are so unhappy that reflection and thinking appear as a curse causing a violent revulsion in you.“
— Emil M. Cioran Romanian philosopher and essayist 1911 - 1995
On the Heights of Despair (1934)

„I'm not "happy" but I'm not unhappy about it.“
— Alan Bennett, The History Boys
Source: The History Boys

„During the primary, I heard the audible voice of God. He said, 'Credibility.' It wasn't a thought in my head. I thought it meant I was going to win. But after the primary, I got credibility.“
— Christine O'Donnell American Tea Party politician and former Republican Party candidate 1969
interview with Wilmington News-Journal, November 12, 2006
2006 Delaware US Senate race