What the part made me the sadest most heartfelt, is when he the joker read the transcripts he stole from the hospital psychiatric records, that is he was adopted Saddening feelings heartfelt for him the most that he never knew and sufferered so much abuse which I believe induced and caused his condition. Poor soult never knew and was caused much trauma by this abuse still supporting his mother which allowed him to be forefront of this abuse to cause him lifelong suffering and mental condition broke my heart for him truly.