The author combines advanced science and math with Eastern mysticism, symbols, art and Western spiritual traditions to create one of the most unique and interesting books one is likely to encounter. Ouspensky points the reader toward higher dimensional realities -- the fourth dimension and above -- while revealing how we can, in a sense, overcome our limited human perceptions that block our access to these higher worlds or planes of existence. An original and brilliant work that waits patiently to be discovered by modern and intelligent thinkers.