If they can get you asking the wrong questions, they don’t have to worry about answers.

Thomas Pynchon (b. 1937) American novelist

Gravity’s Rainbow, Part 2 “Un Perm’ au Casino Harmann Goering” (1973)
    (Source)

Sometimes misquoted as "... about the answers."

Labeled as Proverbs for Paranoids, No. 3.