Favoring the physical bliss component (and any other extended
physical correlates: physical drugs, sacred real estate, heaven on
earth, etc.) of the unified pair of bliss-and-consciousness will lead
one away from the spiritual and temporal benefits of spiritual-bliss.
It will tend towards debauch if one favors the physical component.
However if one keeps appreciation at the level of either the
unification of bliss-and-emptiness or "sees" the emptiness in the
bliss--purification and spontaneous attainment of noble qualities
ripen in our lifestreams.
There is, nonetheless, a serious physical component in yogic
traditions. It is not unusual to meet with a yogin in either the
Hindu or Tibetan tantric lines and have them transmit both teachings
and some form of yogic medicine that they prepared during some
previous sadhana or realization. These are typically given after one
receives a transmission that the yogi's realization empowered during
perfection of a certain practice.
In this context, it's almost a guarantee for the students success.
One can use the ingestion of these substances, so imprinted, as a
perfect body-window for realization.
