In the early 1990's I saw my first Lawren Harris exhibit. The funny thing was when I learned of the Group of Seven in college I wasn't really taken with their work, but when I was surrounded by Harris' large glowing paintings I wept and needed to learn as much as I could about his work and inspiration.
Harris was a Transcendentalist and I always believed that his spirituality flowed from his work. Being in that room surrounded by his paintings felt like being in the sanctuary of a church, so very spiritual. And that feeling is something I attempt to bring to my own work to this day.
I also found it interesting that he stopped signing his work, so that it was judged on its own merit and didn't influence the viewer. Georgia O'Keeffe also didn't sign her work but I believe it was so that it could be hung in any direction that pleased the patron. Again I was inspired by the light and organic form, just like in O'Keeffe's paintings.