God is not a person but a Spirit or Awareness and that 2. Heaven is not a place but a condition in which God Himself resides. There are many references in the New Testament which make quite clear that Heaven is indeed a condition and not a place. This is the condition found by any Saint, Sage, Mystic, God-loving person. Therefore, the purgatory, as well as Heaven, can be experienced right here on earth.
Purgatory is experienced through all our suffering whether it is physical, mental, or spiritual.