Each month according to the Sefer Yetzirah has a chush, a sense associated with it. The sense of the month of Tevet is "anger." Of all the twelve "senses" this is the hardest to understand as in almost all cases anger is a very negative trait. Rachel Trugman gave a fascinating class in Denver about Anger Management, based on Rabbi Pliskin's book Anger - the Inner Teacher. Listen here to get a deeper appreciation of the "sense" of anger.