US-P18.020ab ।US-P18.020cd ॥
In plain words
Just as grief for a child is falsely projected by the ego onto the true self—which is naturally untouched by any sorrow—so too is the grief of being a father falsely laid upon that same pure self.
Close to the Sanskrit
Just as sorrow over a son is superimposed by the ego upon one's own self which is eternally free of sorrow, so too is sorrow over being a father superimposed upon one's own self.