As long as it does not turn iron into gold by its touch, no one can recognize an unknown stone to be a touchstone

Expressions researched:
"As long as it does not turn iron into gold by its touch, no one can recognize an unknown stone to be a touchstone"

Sri Caitanya-caritamrta

CC Madhya-lila

As long as it does not turn iron into gold by its touch, no one can recognize an unknown stone to be a touchstone.

CC Madhya 6.279, Translation

As long as it does not turn iron into gold by its touch, no one can recognize an unknown stone to be a touchstone.