50% sureLots of sources credit Yehudi Menuhin with this, and they agree with each other. The book or the speech it first came from hasn't turned up yet.
What turned up
Only citation found is The Spirit of Flight (2012), a posthumous compilation (Menuhin died 1999) — fails the posthumous-compilation test for verified; widely and consistently attributed.
Work
attributed; earliest found printing The Spirit of Flight (2012)
Occasion
1900s (undated remark)
Sources checked
en.wikiquote.orgChecked using claude-fable-5, 21 August 2026Wikiquote entry sourced only to a 2012 posthumous compilation
Nothing made from these words yet — Storyfaire is where they get made.