Hamlet is told that he is committing a crime against both heaven and God with his excessive griefing, and it shows that he is vulnerable and weak-minded.

Claudius told Hamlet that he is committing a crime against both heaven and God with his excessive grieving, and it shows that he is vulnerable and weak-minded. The most important takeaway here is that death is inevitable and its is humanly to grief the death of our loved ones but this must be done with moderation.