Why do we say Inna Lillah? Allah praises the one who, when, calamity strikes they say “We belong to Allah and to Him we shall return”. 

The first reaction of a true believer, whenever something good or bad happens is to seek Allahs help. Allah is the most powerful. At our end, in this world, it is just the beginning of the true life. 

When our loved ones die we are mourning for them, even though they are in a better place.