While it is true that it takes more courage to rob a bank than to steal a paper clip there are other sins involved in the bank robbery. The person who steals a paper clip sees it as no big deal, nobody will miss it, it won’t cause any harm. The armed bank robber callously terrifies people possibly making them think they are going to die in the next moment. Some people are even emotionally scarred for life. The bank robber then is commiting the sin of selfish lack of compassion. The same would hold true of someone who cons another out of their life savings. Not only are they harming that person but all of their loved ones too.
Yes, big crime takes courage, it also takes cruelty.
But cruelty is nothing more than courageous evil. There is a hidden point here: most people refrain from evil, not because they are inherently ethical and want to refrain from evil, but because they are afraid of the consequences--perhaps punishment, perhaps shame, perhaps loss of life or health or money or friends or family.