The works of Ādi Śaṅkarācārya

Sanatsujātīyam

p. 225

p. 225

यो वा अकथयमानस्य ह्यात्मानं नानुसञ्चरेत् ।

In plain words

Or the one who cannot trace his way to the ātman of a teacher who will not speak of it —

Close to the Sanskrit

Or he who, indeed, would not follow after the Self of one who is not declaring it —