Kena UpanishadThinkers

Brahman (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠unknown to those who know It, and known to those who do not know It at all.