What a very good question. This is my opinion therefore take it for what it is worth( which could be nothing ha ha ha). When it comes to Hermeneutics one must engage it with balance. For example.
2 Timothy 2:15
Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
This shows us that man should study the word and received from the word not just in spirit but mentally. The word study means
application of the mental faculties to the acquisition of knowledge. So when God tells us to study he wants us to receive not only in spirit but in mind so that we can have logical answers and not as some say Blind faith which is never true.
This is where I believe the spirit comes in.
2 Tim 3:16
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
This is a wonderful verse because it tells us that all scripture has been given by the spirit of God in the past and there is no new revelation coming forth as far as someone coming up with some new book what we have is it and the base or foundation of the believers life( these scriptures and books of the bible given by the spirit) He is it's expositor first and foremost. he goes on to talk about doctrine(understanding key biblical principles) reproof, correction, and instruction in righteousness this is the purpose of why the spirit gave the scriptures not to make us big shots or the next T.V preacher, but so that we can apply the word to our lives. Now I don't like to split hairs but we miss something here which is the phrase (inspiration of God). in the greek that means "God breathed" he is the one that gave life to the scriptures and is still giving life to it. So here it is. When we study the word taking a systematic approch to it and follow laws of interpretation (Hermeneutics) the Holy Spirit who is a spirit of truth (John 16:13) and John 17:17 says the word the scriptures are truth reveals to our minds what he has said in his word and once he does that Freedom is the result have you noticed when paul told timothy that some are ever learning and never able to come to the knowledge of truth (2 Timothy 3:7) I wonder why that is. well I feel that it is because the holy spirit makes the word know to us not in a mystical way, but in the context of what he has placed in the scriptures not violating his own word( which is how cults and false revivals get started. Jesus said you shall know the truth and the truth shall make you free John 8:31-32 he did not just say that he said that before we receive truth we will have to continue in the word (toil over it, for example study is mental toil) and then and only then truth(Gods word is revealed and how is it revealed well the spirit of truth the holy spirit reveals it) so we see that God like the brothers said in the post below not want you to have a spiritual mystic view of the scriptures or you will end up in the Lakeland ditch. But he wants you to have a logical understanding of scriptures in the context of what it is saying which he will help you obtain by his spirit revealing truth to us first by his holy spirit to our spirit illuminating the mind to give us a logical understanding as well remember what Hebrews 4:12 says.
For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
Show us the word not only effects our spirit but our understanding, mind and logic as well because we know as a man thinks in his heart so is he.
So both Hermanutics and the Holy spirit are valid for proper biblical interpretation.