Well, that depends. I won’t participate in an observance that I feel brings about ritual impurity or which requires the espousal of beliefs that are contrary to mine or which I find deeply offensive. I will not, as an example, deny the existence of my Gods, seek atonement for sins I don’t believe in, permit others to pray for me or attempt to spiritually “heal” or “deliver” me – nor do I feel the need to participate in any kind of vague, watered down, ecumenical service. But on the other hand I’ve proudly stood by others as they offered sacrifice to their Gods even though they weren’t my Gods, I’ve marched in a Catholic procession through the streets at night, and been witness to many beautiful and touching displays of religious sentiment. I think that we can learn a lot about what makes good ritual by exposing ourselves to the practices of others, since it is fundamentally an art form whose essential components cut across cultural and ideological divides. And as a polytheist I affirm the reality of all divinities and believe they are worthy of our respect and worship, even if I tend to limit my cultic activity to only a handful of them. My Gods are not jealous and have no problem with me honoring the rest of their compatriots.