“Love is essential. Sex, a mere accident.”
O amor é que é essencial.
O sexo é só um acidente.
Poem (5 April 1935), reported in Poesias inéditas (1930-1935), p. 192
Original
O amor é que é essencial. O sexo é só um acidente.
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Fernando Pessoa 288
Portuguese poet, writer, literary critic, translator, publi… 1888–1935Related quotes

“In sex, healthy perversion has an essential role.”
Original: Nel sesso, la sana perversione ha un ruolo essenziale.
Source: prevale.net

“I am English by education, Muslim by culture and Hindu merely by accident.”
While this is often attributed to Nehru, it was actually something said by the Hindu Mahasabha leader, N. B. Khare.
Khare states, "Nehru’s is a very complex personality. As he himself has explained in his Autobiography, he is English by education, Muslim by culture and Hindu by an accident of birth."
"The Angry Aristocrat", N. B. Khare in A Study of Nehru, Rafiq Zakaria (ed.), 1960.
No such passage exists in Nehru's autobiography. https://www.altnews.in/did-jawaharlal-nehru-ever-say-i-am-english-by-education-muslim-by-culture-and-hindu-by-accident/
Misattributed

“Sex without love is as hollow and ridiculous as love without sex.”

“I think sex with him might undo my essential cellular cohesion.”
Source: Faefever

“The difference between sex and love is that sex relieves tension and love causes it.”
Source: Intercourse (1987), Chapter 7
Context: But the hatred of women is a source of sexual pleasure for men in its own right. Intercourse appears to be the expression of that contempt in pure form, in the form of a sexed hierarchy; it requires no passion or heart because it is power without invention articulating the arrogance of those who do the fucking. Intercourse is the pure, sterile, formal expression of men's contempt for women; but that contempt can turn gothic and express itself in many sexual and sadistic practices that eschew intercourse per se. Any violation of a woman's body can become sex for men; this is the essential truth of pornography.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 477.