"Its life's illusions I recall.."

At some point during my teanage years my mom said that it was the duty of any parent to preserve the childs illusions. I didn't quite understand right away, but it stroke me as some important sentence, motivated by some powerful experience and emotion. I understood what my mom said - at least I think I do - after a series of painfull disillusions, partly caused by herself. Some things, I really didn't want to know and some I shouldn't have known.

But my mom didn't tell me what a child should do with its parents illusions.