Empiricism is philosophical, states that all knowledge are derived from the physical senses or sensory experience. It postulates that nothing is true unless its sensory proven, and that all beliefs are false unless proven through the senses.
For many this provides a foundation for someones beliefs, such as God/s or Goddess/s because they experienced him or her through the senses. For many the senses goes beyond the physical realm, and that a shift in consciousness or an altered state of consciousness, the senses become more sensitive. people argue that this can bee seen through the use of mind altering psychoactive drugs like MDMA, LSD, DMT ect. that alteration of the senses and consciousness alters the perception of reality.