I don't see what the
will of some religious deity has to do with the upgrade process of OpenBSD.
-STABLE releases aren't made available in binary form, so you cannot directly upgrade from -RELEASE to -STABLE.. you must either apply
errata patches to the
source code of an OpenBSD release, or use
cvs(1) to update your copy of the source to the -STABLE tree and recompile.
The same goes for -CURRENT, you cannot obtain that in binary form... but you can get something close to it by using snapshot releases that are created periodically for testing and from there you can compile and install -CURRENT, check a local FTP/HTTP mirror for more details.
As has been said, all this terminology and instructions for achieving what you want are on the FAQ.. reading it throughly is a simple requirement of using and understanding this operating system efficiently.