Guilt comes from fear of not having lived life
If somebody gives us this deadline, 'You will be alive till tomorrow morning; you can do whatever you want,' just look inside your mind as to what all you will do. If you will do anything other than your daily routine, be very clear that your morality is just skin deep. Your morality is just skin deep. What does it mean? You are controlling yourself for some reason. You are not living your whole life for some reason.
As long as you don't live your whole life, you will always feel that you are missing something. The feeling that you are missing something is the root cause for fear of death. Mostly, we are not even afraid of death. We are afraid that we have not lived our life. Actually, it is not fear of death. It is the fear that I have not lived my life. Guilt is the root of fear of death.