Both.

Learning to appreciate more fully what you have before you lose it.

That's a tough question. Neither is easy. Probably I'd have to say that it changes you. The mourning eventually ends. The changes are permanent. Suffering diminishes you. Too much loss, starts to feel like a psychic boat anchor. Sure, I've found strength I didn't know I had, and I've transcended it, yadda-yadda, but nothing changes that the loss of someone you value is an obscenity that you're forced to live with against your will. And it is a life sentence.

Maybe the saddest part is that I've ceased to care about and believe in so much that used to sustain and inspire me. I've cobbled together other things to care about and believe in, but it isn't the same.

My late wife passed away exactly one year today Sept 13th 2017,mourn her loss? Yes,still do, 27 years flew by,grief comes in waves,I've avoided the eating places we used to go to,so many memories there. As most of our shopping was done together,she would find me and show me what she bought,sometimes the same items in our shopping carts.

It changes your environment .

It depends on the type of loss, I think. I have grieved loss from death and loss from abandonment. Still not sure which is worse.