Walls signify a block to progress, a difficulty we have or will come up against. Often the nature of the wall will give some clue as to what the block is. For instance, a wall which looks old will signify an old problem, whereas a glass wall would indicate some difficulties with perception. Walls closing in could describe the remembered feelings of birth, but is more likely to represent a feeling of being trapped by the lifestyle we have. A brick wall, rampart or dividing wall all signify the difference between two states of reality - often the inner psychological state and the exterior, everyday world.