The butterfly effect – The Butterfly Effect is a phrase that encapsulates the more technical notion of sensitive dependence on initial conditions in chaos theory. The idea is that small variations in the initial conditions of a dynamical system produce large variations in the long term behavior of the system.

Feelings of guilt can change behavior.  Guilt can make a person dour.  Guilt tends to reduce self esteem.  Guilt can manifest physical ailments.  Guilt can manifest emotional and mental conditions.  Guilt can cause death.

When a person feels guilty about a situation, they tend to avoid the people they feel guilt about.  A guilty person will develop a negative aura that others try to avoid.

A guilty person is less likely to be involved in business or social opportunities. 

One of the things I love about most religions is the notion of forgiveness.  Forgiving yourself can remove guilt.  Removing guilt can be the single biggest improvement any of us can ever make in our lives.