[ErrantX]

because all of us need to believe in something

Numerous studies have shown that this is not correct.

You are right in the sense that it is impossible to live life as a pure empiricist - at some point you have to take some things on trust, and probably on faith.

But a deity faith is not required. :)

[Gormo]

It's impossible to be a pure empiricist because you must translate your experience of reality into a conceptual representation in order to think about it at all.

Perhaps you can be purely empiricist if you have no conscious awareness. But if you are conscious, you can approximate empiricism by maintaining awareness of the distinction between reality and your understanding of it.