Albert Einstein? William Miller? Apocryphal?

Question for Quote Investigator: A famous scientist once stated that it was important to never stop questioning because curiosity has it own reason for existing. I do not recall the exact phrasing. This notion has been attributed to physicist Albert Einstein. Would you please help me to find a citation?
Reply from Quote Investigator: “LIFE” magazine editor William Miller visited Albert Einstein at his home in Princeton, New Jersey and interviewed him. Miller’s piece appeared in the May 2, 1955 issue of “LIFE” shortly after Einstein’s death in April 1955. Miller asked Einstein about curiosity. Boldface added to excerpts by QI:1
The important thing is not to stop questioning. Curiosity has its own reason for existence. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend only a little of this mystery every day. Never lose a holy curiosity.
Below are additional selected citations in chronological order.
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