You misunderstood, it wasn't a reference to Christian ideas but Buddhist ones. In Buddhist terms absolutely nothing has any permanence, everything is change, and that would include any God, and anything we think forms part of a human being.

Dogen is quoted as having said: "From the very beginning nothing exists". How then could there be anything that is eternal?

However, one does find Buddhists who refer to deities, pray in front of statues, although not to them, speak of Dakinis, assembled masters, etc. One should not make the mistake to think that these entities are in some way permanent or even real, as in having an independent existence. They all belong to something called 'the skillful means' which are temporary inventions, devices, ideas, concepts, created to assist us in overcoming a hurdle, difficulty, or human condition.

They are all rafts, used to get to the other shore across the river, but once we have reached the other shore there is no use for the raft anymore. If we hand on to the raft it becomes a burden, so discard it and move on. If we need to cross the river again we'll just build another raft.