I believe sage (salvia officialis) looks the exact same as salvia divinorum, and a quick google image search confirmed this. The only way to know would be to pack 3 or 4 leaves in a bong and hit it, hold the smoke in for a good long minute, and try to do that 4 times. Also, use the hottest flame you have, since salvia vapourizes at 240*C.

Salvia is a beautiful plant and a wonderful introspective ethnogen, but it is by no means meant to be fun.

"Salvia is an aid for inner exploration and meditation. It is not a "party time, let's get high" substance. If you approach it as such, it may just kick you in the butt and slap you senseless for such disrespect."