Mysticism is the numinous experience of the Divine. In one sense, mysticism is an esoteric, interior experience. Mysticism is also the experience of the exoteric, Mass and the Eucharist. The esoteric and exoteric are always in tension with one another - my interior experience of the Divine is challenged and is formed by my exoteric experience of Christ's Body, the Church. The Ascension, Christ in his glorified body at the right hand of the Father in Heaven, is the end and purpose of all life, the goal of both the esoteric and exoteric experience, especially made manifest in the anointing of the sick and the funeral liturgy.
The Council of Jerusalem, the first Church Ecumenical Council, set the tone for how the Church resolves difficult decisions. Do Christians need to be circumcised? Abstain from meat with blood in it? The Council of Jerusalem, the 15th Century Council of Florence (Basil) and even Trent, Vatican I and Vatican II are legacies of the first council recounted in Acts and Galatians. "‘It is the decision of the Holy Spirit and of us..." Words that have guided the Church to the present time.
In Revelation 21, "I also saw the holy city, a new Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband." John compares the Whore of Babylon to the Bride of Christ and Babylon doesn't come out well.
Both Paul and Barnabas spoke out boldly and said, “It was necessary that the word of God be spoken to you first, but since you reject it and condemn yourselves as unworthy of eternal life, we now turn to the Gentiles. For so the Lord has commanded us, I have made you a light to the Gentiles, that you may be an instrument of salvation to the ends of the earth.” Acts 13:14, 43-52