"Is this all there is? Struggle, loneliness, disease, and death ... Is this all there is? Life can seem so chaotic, so dreary, so grindingly hard. Who among us has not dreamt of some higher reality, some transcendent level of meaning and peace? There actually is such a higher reality ... And it is not so very hard to reach. For many, the fourth dimension has served as a gateway into it. But what is the fourth dimension? No one can point to the fourth dimension, yet it is all around us. Philosophers and mystics meditate upon it; physicists and mathematicians calculate with it. The fourth dimension is part and parcel of many respected scientific theories, yet it is also of great use in such disreputable fields as spiritualism and science fiction."