Yes—at first one is sort of concussed and ‘life has no taste and no direction’. One soon discovers, however, that grief is not a state but a process—like a walk in a winding valley with a new prospect at every bend.
Lewis couldn't have put it any better, as usual. I would, however, add that it's not only grief that is not a state, but a process. Life itself is a process, and the "winding valley" produces surprises at every bend. We see some of them as prospects, and some as setbacks, but each surprise is either God-ordained, or God-allowed. He will now allow His children to be tried beyond our ability to not only survive, but learn and profit from it.
I've not finished my grieving process, and may never fully complete it, but I must move on. As Lewis implied; the adventure lies in finding out what lies around every bend.
"See, God has come to save me.
I will trust in him and not be afraid.
The Lord God is my strength and my song;
he has given me victory.”