"The reason that can be reasoned is not the eternal Reason.
The name that can be named is not the eternal Name.
The Unameable is of heaven and earth the beginning.
The Nameable becomes of the ten thousand things the mother.
Therefore it is said:
'He who desireless is found
The spiritual of the world will sound.
But he who by desire is bound
Sees the mere shell of things around.'
These two things are the same in source
but different in name.
Their sameness is called a mystery.
Indeed, it is the mystery of mysteries.
It is the door of all spirituality. "
(Lao-Tzu 6th century BCE)
"so that they may all be one. Just as you, Father, are in me and I am in you, may they also be one in us..." (John 17:21)