Inna lillahi wa Inna Ilaihi Raji’un (Surely we belong to Allah and to Him shall we return) I like to think of grieving as feeling sorry for yourself. A dead person does not suffer - but those left behind will miss them. Some part of grieving is feeling sorry for others who will miss the deceased.  I might be tough, but I don't see a thing wrong with crying 'cause it an individual thing.