The Spirit of God on some level witnesses to a person’s spirit that the Word of God is true. The person then makes a decision based on that “revelation”. This is a form of mysticism. There are greater degrees of revelation that can be given to people. Sometimes it comes as an intuition and can at other times be a full blown vision. Whatever the degree, it is the Spirit witnessing to the person’s spirit.
Then there are the counterfeits put forward by the enemy. How to tell the difference? Anyone who is accustom to the “taste” of the Spirit will know when that which is before them “tastes” of God or not. Then sadly of course there are many Christians who have never learned to discern what is of the Spirit, a spirit or their own spirit-soul-mind. Another group of “Christians” are those who have been raised in the church without ever meeting their God. Some of these Christians follow another spirit not from God.
Is mysticism good or evil? Depends on what Spirit/spirit/spirit-soul-mind is at work in the experience.
🙂