I'm an Aikikai Aikidoka, and we haven't discussed the spiritual side much at all. My instructor, however, practices and until recently taught T'ai Chi as well, so I know he believes in the spiritual end of things. I figure that, being a mu-kyu, he doesn't feel I am ready to go into all that yet. For now, I'm content to wait, though I'm reading any books I can get my hands to tide me over for now