There is an Amoraic Statement that seems bizarre.  It is “man doesn’t sin unless a wave of stupidity overcomes him” (Sotah 3a).  Whats strange is that this doesn’t seem to be the case.  Don’t most people sin because they are tempted by it?  Gossiping about a competitor isn’t stupid.  It might be mean and selfish but it’s not stupid?  So what does the Gemara mean?  The answer might surprise you.