During one of the most critical times of the Civil War, Abraham Lincoln wrote to his friend Joshua Speed:
"I am profitably engaged in reading the Bible. Take this entire book upon reason that you can & the balance upon faith & you will live & die a better man."
The intimation might be that most of the Bible you can take on reason & only a small portion will require the exercise of faith. But if you are to receive the Bible as a revelation from God, you must take it all upon faith.
Psa 119:92 (NET): "If I had not found encouragement in your law, I would have died in my sorrow."
“An honest man with an open Bible and a pad and pencil is sure to find out what is wrong with him very quickly.” - A.W. Tozer.