Lyric discussion by ruarchitect 

I don't think its so much about an over protective mother as it is about a mother who is teaching her son that life is all bad and that he should fear life. She puts all her fears into him. So he builds a wall to protect him from the evil world on the other side(with her help). His fear of life and his lonelyness leads him to insanity. The last line "mother, did it need to be so high", he comes to the realization that his mother has made his this way.

It's not entirely her fault though, since her world probably was very dark, having lost her husband to war and being left alone to care for her single child. This could understandably make her protective of her son (Pink), which is the closest to his father she will ever have again and who seems to be her only close family.

@ruarchitect What you are saying is the literal meaning of over protecting, it's indirect but severely affective!

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