Guilt is the sense of having done wrong. It may also in another sense come to mean sin. It therefore results from having gone contrary to the Will of God. Acts contrary to the Will of God therefore result in guilt. Guilt leads to pressure which weighs down. The pressure is real. For those who are sensitive, there is a sense of being weighed down by something.
Guilt, being dark is ethereally heavy and when it attaches to the ethereal body it actually burdens this body and drags it down. This would explain why such people feel weighed down by it. A guiltless person on the other hand feels light and free since there is no added pressure or weight to the ethereal body. Elimination of guilt requires that the individual adhere to the Laws of God. A constant good volition will soon see the end of all guilt.