Anger - vice or virtue?

Thomas Aquinas goes so far to say that the lack of anger can be a sin.  Jesus got angry when he threw the money changers out of the temple. So, virtue or vice?  Is it ok, even good, to get angry?  Or is anger dangerous, is it SINFUL? Anger is the 5^th of the deadly sins.  We explore this tension this Sunday.  We will be sharing the communion meal during the service.  August 16, 2015.