In Hari-bhakti-vilasa, verse 2.147, Srila Sanatan Goswami quotes
Sammohana-tantra:
gopayed devatam istam gopayed gurum atmanah
gopayec ca nijam mantram gopayen nija-malikam
One should hide one's ista-deva, one should hide one's guru, one should hide
one's mantra, and one should hide one's japa-mala.
Wise persons keep their valuables in a confidential place. Similarly, an
intelligent sadhaka does not advertise his or her guru, nor do they
broadcast themselves as disciples of their guru. Considering thems