Johan Maurer lifts up a 1974 publication by John Yungblut:
Granted, as a deep student of Carl Gustav Jung and Pierre Teilhard de Chardin, Yungblut’s definitions of those three adjectives may not have exactly been old-school. This particularly goes for his reflections on the word “evangelical.” But the dynamic conversation among these qualities — different definitions and all — may be vital if Friends are to grow in usefulness to the Body of Christ, and to those who’ve not yet been convinced.
https://blog.canyoubelieve.me/2018/10/quakerism-of-future.html