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Salvation does not include works. One is saved at the moment of conversion and the Holy spirit is now in residence in the repentant believer. Afterwards, 1st John says, "But whoso keeps his word, in him verily is THE LOVE OF God PERFECTED, hereby know we that we are in him". I am not going to type out a lot of verses, but just ask that before anyone starts giving personal opinions, look up the key words in the question from your CONCORDANCE, and use the KJV. Ideas from commentaries, books and opinions just do not cut it, the truth is only found in the word of God, don't go else where. And stop all these cutting remarks to each other, that behaviour is shameful.
I know that there are commentaries written by liberal theologians that do not even believe in the inspiration or infallible inerrancy of the scriptures but I don't read those authors and I am not recommending that any one should. However, there are many great commentaries to reference that will help illuminate understanding that is not "a man's" opinion, but a sound hermeneutic / interpretation, often bringing up other scriptures to support that hermeneutic.
If someone refuses to ever examine a commentary under any circumstances I can almost guarantee you that they are not very knowledgeable in scripture and much of their understanding of scriptures are wrong and while they pontificate with over zealous confidence they are oblivious to the fact that they are viewed by their readers as quite ignorant. Why? Because no one who really knows the word of God in depth with correct interpretation would say they never review commentaries.
The only people who do not believe in referencing great Bible reference books are people who never read great bible reference books. Before you call me "Captain Obvious" what I mean to say by that is that any one who does read great Bible reference books including great commentaries will have gained so much by the experience that they would never make such a comment.
Every time (without fail) that I have encountered someone that refuses to reference commentaries, and who seems to take great pride in denigrating the use of commentaries. that person has had a GREAT need to reference commentaries because they are often misinterpreting scriptures that they think they know.