Spiritual isn't the best descriptor, but I mean anything that has made you feel at peace on a metaphysical level. Mine was probably the most memorable moment I've had high. I just went and sat in my backyard one night to look at the stars and slowly the sky started to look 2D and I felt like I had painted it, then everything else became part of the painting and my yard felt like a constructed terrarium or something that was a very small part of an incredibly immense whole. It made me feel very in control knowing that there was a system at work and I was consciously creating a reality within it, although I didn't know if I was making the rules or just following them. These have been my existential views for a while but it's one thing to think it, it's another thing to feel it.