Are guilt and shame necessary emotions, or would we be better off without them?

Without these negative emotional impressions we would never change, would never leave our self-justifying, self-serving comfort zones, thus they are absolutely necessary for our development.

But it is important to use, channel them correctly, as only in the right, mutually supportive, mutually complementing environment, through the proper, purposeful and practical method can these disturbing negative feelings lead in the right direction, goal.