SMART does have a will, it has a purpose...to help addict get and stay clean. If SMART didn't affect people, why would it still be around? Some people credit SMART with saving their lives, if that isn't a power greater than theirselves working in their lives, then what is? Living by "SMART's will" would be simply applying what is learned in your daily life, using the tools gained, not using.
The "power greater than yourself" talked about in NA has absolutely no restrictions on it, ic and be whatever you want it to be....even a doorknob
...It doesn't have to be this angry father figure in the sky that swoops his hand down to save you from yourself...