From a reader:
Was Vatican II an ecumenical council with infallible guidance by the Holy Spirit, or a pastoral council which is not infallible?
The Holy Spirit’s guidance is never anything but infallible. Can the Holy Spirit make a mistake?
However, a lot can happen in the stages between the Holy Spirit’s guidance and the typewriter.
The Holy Spirit does not make mistakes. We make mistakes even when the Holy Spirit is trying to help us.
The Second Vatican Council was an ecumenical Council. Surely the Holy Spirit guided the Council (Cf. Vatican I, Session III, Dogmatic Constitution on the Catholic Faith, 24 April 1870). I don’t have any special insight into what way the Holy Spirit guided the Council.
The Holy Spirit didn’t personally write any of the documents of Second Vatican Council.
That said, the Second Vatican Council was just one of many Councils the Church has held, under the guidance of the Holy Spirit, and it wasn’t even the most important Council.