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God wants you to experiment His word and test it, so it can be proved that He exists.
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You're speaking like a true fanatic. Don't you notice the logical fallacy you're comitting? It's called "begging the question". By saying "Experiment His word" to prove his existence is like putting the cart before the horse.
Let me illustrate how faulty your reasoning is: "God exists because the bible says so. I believe the bible because it is the word of God". This will lead you nowhere; you're just arguing in circles. In Logic it's called "Circulo Probando".
If God challenges us to experiment, why does the bible say "blessed are those who believe yet they have not seen"? or why does it require one to have a "child-like" faith? It doesn't look like it invites genuine experiment.