OK i found this out by mistake while playing my piano and i was hoping someone could please explain the theory behind it. Apparently ou can effectively move from one chord to the immediate next chord by using a Dim chord. Example, moving from Cmaj to D min, i can use the C#minor dim and it sounds awesome!!! Of course it has a Gospely kind of sound but stil...

Is there some theory behind it? I noticed also that the Cmaj and C#min dim have E and G in them. So whats going on behind the scenes musically?