The Nobel Prize-winning physicist (and atheist) Steven Weinberg made the point as well as anybody, in Dreams of a Final Theory:
Some people have views of God that are so broad and
flexible that it is inevitable that they will find God
wherever they look for him. One hears it said that 'God is
the ultimate' or 'God is our better nature' or 'God is the
universe.' Of course, like any other word, the word 'God'
can be given any meaning we like. If you want to say that
'God is energy,' then you can find God in a lump of
coal. (The God Delusion-Richard Dawkins)
Isn't this the same idea much more convincingly described in great detail in Upanishads?