God is a spirit

An organization is not a spirit.
One can not see a spirit.
Therefore a GROUP of what you can see is NOT
a spirit.  God is a spirit.
God is looking for them who want to worship God
in spirit and in truth.
To worship God one does not need an organization.
But you might wonder, what about The Nation of Israel?
What about the ARK?
What about the Christian congregation of the first century
with it's body of elders?
Those three things a for mentioned have something in common.
Do you see what it is?
Please post a comment.  Thank you.