Another factor is that when he was in prison, he came into daily contact with gangsters, opium addicts, and prostitutes, after which he showed even greater sympathy for the weak and disadvantaged.
草根渭水具有包容各階層朋友的草根性外，蔣渭水在獄中與流氓、鴉片仙、妓女等人朝夕相處後，更展現一份對弱勢階層的悲憫之心。