To whomsoever it is not known - Kenopanishad

यस्यामतं तस्य मतं मतं यस्य न वेद सः ।
अविज्ञातं विजानतां विज्ञातमविजानताम् ॥

To whomsoever it is not known, to him it is known.
To whomsoever it is known, he does not know.
It is not understood by those who understand it;
It is understood by those who do not understand it.

Kenopanishad