I get good chills/goosebumps during the Cherubic Hymn and Consecration at Divine Liturgy. Also (not chills or goosebumps but a slow buildup of contrite sorrow) when I am praying the Jesus Prayer. I also get a weaker sensation similar to the first when I go up to reverence an icon or the Gospels, unless the icon is Christ the Pantocrator, in which I feel the second if I have sinned.
I would agree, to a limit, with Mr. Crowley, I think. Do not base your spirituality on such physiological elements alone, but I would not discount them. They can come from many sources, yes, but they can also tell you quite a bit. If from God, He is trying totell you something. If from your psychology, it is responding positively, if from the Enemy, he is trying to deceive. I do think that one can find out through speaking with one’s spiritual director and prayer.
Lord, have mercy.