Generally, I’ve just given up. If they are only making polite conversation, I steer things another way all the while ensuring them I’ll answer any questions they may have but still offering up little more than that. If they truly are interested though, I will make an attempt to explain the basis of being an experience and practice based religion whereby belief is derived individually therefrom without having actual mandated doctrine of belief. This is not something I bother with for most. Honestly, it is just not worth the effort.
This then brings me to the second difficulty, trying to relay experience verbally without breaking any oaths. Quick, try and explain sex to someone that has never done so and see if you can truly have them understand the experience of it, oh and you are not allowed to say what you did, how you did it, or use any terms that might give away the fact you are talking about sex. The closest I get to explaining what Witchcraft is about is through a combined approach of explaining my personal work within the greater framework of Contemporary Paganism. For example, I might say, “Samhain is usually the time when Contemporary Pagans honor the dead. I do this by having a silent meal where I reflect upon those I have lost and my ancestors.”
"Lost in a thicket bare-footed upon a thorned path."