Causes of violence (i) self defence, survival (ii) emotions linked to threatened self esteem (selfish) – jealousy, pride… when compare self v others – not recognising your own “sin” or weakness , not being loving and happy for others’ success. Here it seems Cain was jealous of Abel – not sure what gift Cain offered to the Lord maybe his gift was it’s an ordinary fruit rather his best fruit v it seems Abel’s was the best / fat lamb? So the Lord knew Cain had not tried his best (& Cain knew in his heart too..) – he had been selfish /sinful. Cain murders Abel but the Lord protects Cain from being killed by others – it is wrong to kill + so Cain had to live for the rest of his life bearing his guilt – very heavy burden – isolation from the Lord unless he can seek forgiveness…?