 You go away from him, and you start heading in a direction where you become your final authority rather than God. This is a T in the road right in the first verse of Scripture. So God never expects us to have a blind or baseless faith, though. Christians aren't like, oh, your faith is just out. No, it doesn't need to be that way. So what is the evidence that God exists, and why should we trust what he has spoken in his word? Very key question.