There are probably those out there that would consider the very idea of being aroused by thoughts of heaven as blasphemous. Personally, I think this might be the ultimate expression of faith in that you can take such joy, such pleasure, from the mere thought of heaven alone. Heaven is the expression of all that is good, all that is wholesome, all that is beautiful, and if it is wrong to derive pleasure from thoughts of such, then the world is a much sicker place than even I believed.