This Mahāmudrā that has been described grants great siddhis to men;It should be kept carefully and not given to just anyone.

Mahā-siddhi-karā — bestower of great siddhis.The text reiterates the extraordinary powers conferred by this practice, thus justifying the restrictions on its transmission.

Gopanīyā prayatnena — must be kept with effort.This secrecy instruction is common in tantric and Haṭha Yoga texts.The reasons are multiple: to protect the uninitiated from dangerous practices, to maintain the purity of the transmission, and to preserve the power of the techniques.

Na deyā yasya kasyacit — should not be given to just anyone.Teaching requires a qualified student and an appropriate context.However, with the modern publication of these texts, secrecy has been transformed into responsibility: each practitioner must exercise discernment about his or her preparation and seek appropriate guidance.