No.12822743 ViewReplyOriginalReport
Actually, everyone has an AT field, and that it is the literal wall that separates one's identity from other egos and external reality, and which supports one's having a separate existence from others. Thus, it is also the cause of loneliness and pain, and can be related to the so-called "Hedgehog's dilemma" exhibited by Shinji — whereby a person feels (psychological) pain from loneliness, yet paradoxically, the closer he/she gets to someone else (emotionally), the more he/she is 'hurt'.

At the climax of The End of Evangelion, after the Third Impact, the re-awakened Lilith produces a massive Anti-AT field that neutralizes the AT fields of all human beings, thus returning them to an undifferentiated state — the tang, containing the unseparated consciousness of the entire human race.