The Godhead--that mysterious, paradoxical Trinity that we just don't fully understand how His three separate essences make up one Being. Separate, yet one. Equal, but graduated: The Father, the Son, the Holy Spirit.
There are so many things about this physical world we don't understand. Why would we be suprised not to grasp the supernatural world--a world we aren't (but are) a part of. What an awesome place we inhabit, and I somehow think it's even more amazing just beyond my sight...and also that I could perceive more if I just had eyes for it.