“I was taught at school never to start a sentence without knowing the end of it.”
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Paul Dirac 23
theoretical physicist 1902–1984Related quotes

“Never start a sentence with the words 'No offense.”
Source: The Happiness Project: Or Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun
Source: Dumbing Us Down: The Hidden Curriculum of Compulsory Schooling (1992), p. 19

On how envisioning an ending allows him to conclude each character’s journey in “Extended interview: Colson Whitehead on writing ‘The Nickel Boys’" https://www.cbsnews.com/news/extended-interview-colson-whitehead-on-writing-the-nickel-boys/ in CBS News (2019 Jul 14)
“Never end a sentence with a preposition,” he recited.
“Not never; just seldom.”
Cast a Yellow Shadow (1967)

"Talking of Murder" (song)
Gilbert O'Sullivan, "Talking of Murder" https://www.youtube.com/watch?v=a327hRmOEes (song on YouTube)
Song lyrics

Hugo Chávez during his television/radio show ¡Aló Presidente! on October 2, 2005.
2005

“I start in the middle of a sentence and move both directions at once.”
“I go to school, but I never learn what I want to know.”
Source: The Authoritative Calvin and Hobbes: A Calvin and Hobbes Treasury

“A logo is the period at the end of a sentence, not the sentence itself.”