The Bible is a subset of the Truth. The Bible itself references mysteries.
The Bible is the sole infallible source of the Truth. All Truth is consistent with the Scriptures, and since the Scriptures are the sole infallible source of the Truth, then it follows that we must judge all purported truth by Scriptural teaching.
Biblical mysteries are those things that God keeps to Himself. We will only find them out if and when He chooses to reveal them to us.
Wrong! It is THE truth.