Yasyāmatam Tasya Matam
Matam Yasya Na Veda Sah
Avijñātam Vijānatām
Vijñātam Avijānatām

Those who do not understand it, understand it.
Those who understand it, do not understand it.
It’s not known by those who know it.
It is known by those who do not know it.
The Kena Upanishad (II.3)
-translation by Manorma