Death is a surprise. The surprise could be many years down the line or maybe in just a few moments. Except for suicide, the time the button of death is pressed is in the hands of God. We are unaware of this secret. Hence, it is always a surprise.
We hope & wish our soul carries its virtue as reward in the next life. The details, & events of the next life are mere theories. But those who believe in the justice of God know that their good in this life will be rewarded with good in the next life. Hence, the constant striving for good. However, death may knock anytime. Hence, we need to be prepared. Good deeds are the best preparation & provision.
Be prepared for a sudden departure !