Image - church interior
Interior of the Church of the Holy Spirit, Vilnius – which has a remarkably “exterior” look in this image

What does it mean, precisely, to be “spiritual but not religious”? Presumably, generally, something relating to the social reality, or maybe more properly the institutional reality, of something that can be called “religion.” But I have been consistently confused about the “spiritual” part of this phrase. What does that word mean?

It probably hinges on what we think the term “spirit” means. That seems, at present, remarkably vague.