God really has spoken. And this Word is living and active. It is not a dead Word. He really speaks today through the inspired Scriptures. Not just with information, but with himself by his Spirit.

The Word in the Bible is more sure than anything you can hear outside the Bible. I base that on 1 Corinthians 14:37.

If anyone thinks he is a prophet or spiritual he should acknowledge that the things I am writing to you are a command of the Lord. If anyone does not recognize this, he is not recognized.

Paul is saying you can call yourself a prophet and get messages from God. You can call yourself spiritual and be tuned in to God, but if anything you say doesn’t accord with what I say, you are not recognized, which means that outside the Bible we have fallible, uncertain impressions and messages. Inside the Bible we have rock solid dependable messages.

There are treasures and wonders and glories and dimensions of God to be seen in the Bible that we have scarcely seen.  It seems to me to be folly to crave the lesser authority and the lesser riches outside the Bible than the riches and the greater authority that we have barely tasted, let alone digested inside the Bible.

http://www.desiringgod.org/interviews/does-god-verbally-speak-to-me