Colin Wilson (1931-2013) was an English writer best known for his contributions to existentialism and philosophy. The rest of this post is some quotes from Wilson.
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"Boredom is basically a feeling of narrowness, and surely a narrow vision is bound to be less true than a broad one?" (The Misfits: A Study of Sexual Outsiders, 1988)
"The heart, oddly enough, seems to be the essential organ concerned. When we are in a hurry or doing something we dislike, we clench the heart, exactly like clenching a fist and nothing can get in. When we are filled with a sense of multiplicity and excitement we somehow 'open' the heart and allow reality to flow in." (Beyond the Occult, 1988)