I do love the lyrics in Bad
"If I could throw this lifeless lifeline to the wind, leave this heart of clay, see you walk, walk away [...] If I could through myself, set your spirit free, lead your heart away, see you break, break away"
I think they're heartbreaking, they do express the feeling of someone trying to help another person, but without managing it. Moreover, I love when, in the live acts, he adds "Not fade away". It's a desperate cry, a sort of answer, from the one who's trying to help to the one in need.
Of course, I do love the lyrics in One (who doesn't?).
I think it's fantastic also the line in Beautiful day "What you don't have, you don't need it now. What you don't know, you can feel it somehow". It gives me the strenght to hold on.
And finally, the words of Mothers of the Disappeared, One step closer and Miracle drug, which make me cry everytime.