is being a Quaker. The core of the Quaker faith is apparently something called "Inner Light" or "Inward Light". It means that every human soul has a certain element of God's spirit. From the wiki: "God reveals Himself within each individual's conscience and consciousness by the Holy Spirit, Christ Himself being the Light to illumine man's sinfulness and lead in the way of truth and righteousness. ... this light is in all men by the grace of God to lead them to Christ, and that the same light will give daily guidance to the Christian."

The argument is that, if an individual doesn't want to get the vaccine, that's God's will because their "inner light" is guiding them in that direction. Getting the vaccine if you don't really want to is going against God's wishes.

Personally, I think it's a garbage argument but it's the only one I've ever seen explained.