Morning Bible Study: What the Bible Says About Righteousness, 2 Timothy 3:16

2 Timothy 3:16 All Scripture is inspired by God and is profitable for teaching, for rebuking, for correcting, for training in righteousness, 

17 so that the man of God may be complete, equipped for every good work.

Commentary
(the following is from Matthew Henry's Complete Commentary, 1706 -- www.christianity.com)

"What is the excellency of the scripture. It is given by inspiration of God (v. 16), and therefore is his word. The same Spirit that breathed reason into us breathes revelation among us: For the prophecy came not in old time by the will of man, but holy men spoke as they were moved or carried forth by the Holy Ghost, 2 Pt. 1:21. The prophets and apostles did not speak from themselves, but what they received of the Lord that they delivered unto us. God also bearing them witness, both with signs and wonders, and with divers miracles and gifts of the Holy Ghost, according to his own will, Heb. 2:4.

What use it will be of to us. 

• [1.] It is able to make us wise to salvation; that is, it is a sure guide in our way to eternal life. Note, Those are wise indeed who are wise to salvation. The scriptures are able to make us truly wise, wise for our souls and another world. "To make thee wise to salvation through faith."Observe, The scriptures will make us wise to salvation, if they be mixed with faith, and not otherwise, Heb. 4:2. 
• [2.] It is profitable to us for all the purposes of the Christian life, for doctrine, for reproof, for correction, for instruction in righteousness. It answers all the ends of divine revelation. It instructs us in that which is true, reproves us for that which is amiss, directs us in that which is good. It is of use to all, for we all need to be instructed, corrected, and reproved. 
• [3.] That the man of God may be perfect, v. 17. The Christian, the minister, is the man of God. That which finishes a man of God in this world is the scripture. By it we are thoroughly furnished for every good work. There is that in the scripture which suits every case. Whatever duty we have to do, whatever service is required from us, we may find enough in the scriptures to furnish us for it."