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I use the word “must have” loosely. I strongly believe that the Holy Spirit is the greatest tool you can ever have at your disposal to dissect and understand the Word of God. All these tools were written and created by people like you and me, inspired by the same Spirit. Therefore, if the Lord used them mightily then he can also speak to you and give you wisdom to understand his word.
These tools should be an addition not a substitute for the Holy Spirit. If you are able to incorporate these suggestions in your study, you won’t be sorry. Your bible study will be greatly enriched by them.