Anger, depression, guilt, and shame are the product of the thinking that is at the base of violence on our planet.
We want people to change because they see better ways of meeting their needs at less cost, not because of fear that we're going to punish them, or 'guilt' them if they don't. This applies to ourselves as well.
We want to take action out of the desire to contribute to life rather than out of fear, guilt, shame, or obligation.