Would you be ok with going into your prayer place, your quiet place, with only your bible, and ask God to reveal Romans to you?
Not if you mean by this to do that alone; and not if you mean do that as a PRIMARY means of getting to the truth.
If that is what you mean I'd say to you that that sounds very spiritual- but that's all it does. Well, that's not true. It probably also creates copious amounts of spiritual pride and false spirituality.
It's this kind of thinking dumped on us by pentecostals and charasmatics that has aided the process of our religious culture being ten thousand miles wide and a half inch deep.
God told us to ask for wisdom and God said that he gives it liberally to those that ask.
But wisdom is the ability to rightly divide the word of truth. It is the good sense to understand that we should STUDY to show ourselves approved unto God.
It is the Holy Scriptures that are able to make us wise unto salvation- not some emotional experience or funny feeling or mystical "peace" about something. The Holy Spirit does not whisper the interpretation into your ear via some still small voice. He gives you truth as you study properly- in context, Christocentrically, utilizing original languages and historical setting, authorial intent, intended audience, understanding the literary genre of the piece you are reading and running your interpretive hypothesis through the filter of theology consistently taught throughout Scripture, running your interpretation humbly before the scrutiny of the Body of Christ both contemporary and historical, etc...
Good hermeneutics is the way we discover truth in Scripture. Good hermeneutics is wisdom.
You can pray till the cows come home and you can speak in tongues and roll around in the floor a yell like the banshee; and you can feel like the Holy Ghost is talking to you and teaching you things- but I got news for you: without good hermeneutics you are wasting your time and accomplishing nothing but deceiving yourself and those with no better sense than you have.