- How sure this is
- 88% sureThese words were traced back to where they first appeared. That source is listed below.
- What turned up
- The Open Door (1957, posthumous collection of Keller's writings) — Wikiquote Sourced.
- Sources checked
- en.wikiquote.orgChecked using claude-sonnet-5, 20 August 2026Sourced section, The Open Door (1957)