Re: sceptic on the spiritual side of aikido
I think the spiritual side is an individual thing. It does not require belief in the things that you state. The practice of aikido may help you understand yourself, your beliefs.... it may help you understand people, human nature, and interactions with others more closely.
I am somewhat spiritual, and my beliefs on things pretty much parallel yours...There is room in my spiritual practice for aikido.
KI, if aikido helps you be aware of it and helps you understand it some...whatever that may be to you...then I think it is somewhat spiritual in nature.
It does not require absolute belief in any thing dogmatic. It is not a black or white, or the "book says I must believe this" kinda "spirituality".