Why: this should never be spoken to one without austerity, without devotion, unwilling to listen, or one who speaks ill of Krishna, adding a note of discernment about who is actually ready to receive this final, most radical teaching.

In life: even the most valuable guidance isn't necessarily helpful to share with someone who isn't yet ready or receptive to it, timing and readiness matter as much as the value of the guidance itself.

Teaching: before sharing your own most important, hard-won insight with someone, consider honestly whether they're currently ready and receptive to it, this verse suggests even genuinely valuable guidance can land poorly, or be actively rejected, if the timing and receptivity aren't there yet.