From anger, complete delusion arises, and from delusion bewilderment of memory. When memory is bewildered, intelligence is lost, and when intelligence is lost one falls down again into the material pool (Bhagwad Gita 2.63)
As per Bhagwad Gita 3.37, the anger and lust are the biggest enemies of the mankind and when they attack someone, his wisdom is lost and sometimes it leads to irreparable losses.