Grieving after Death, What to Expect after the death of a loved one

I found the best description of grieving I have read in a while in Michelle Obama's autobiography, "Becoming", beginning in Chapter 11.
"It hurts to live after someone has died. It just does. It can hurt to walk down a hallway or open the fridge. It hurst to put on a pair of socks, to brush your teeth. Food tastes like nothing. Colors go flat. Music hurts, and so do memories. You look at something you'd otherwise find beautiful - a purple sky at sunset or a playground full of kids - and it only somehow deepens the loss. Grief is so lonely this way."
  "(My brother and I argued over our father's casket choices.)  We were yelling for reasons that had nothing to do with the actual argument. Neither of us was invested in the outcome.
    We were having an absurd and inappropriate argument because in the wake of death every single thing on earth feels absurd and inappropriate."