He that desires to read his Bible with profit, must first ask the Lord Jesus to open the eyes of his understanding by the Holy Spirit. Human commentaries are useful in their way.
The help of good and learned men is not to be despised. But there is no commentary to be compared with the teaching of Christ. A humble and prayerful spirit will find a thousand things in the Bible, which the proud, self-conceited student will utterly fail to discern.