[fellowniusmonk]

Never seen this before, as a person who has grieved considerably but won't/doesn't read grief literature.

I came to the conclusion years ago that grief is just unexpressed, unshareable, uncommunicable, thwarted love. It's all the love I cannot give, all the words and touches and moments that fail to alight on the one I love but instead, missing its intended, affix me to the void.

So not merely entwined, I think grief is love itself unsatisfied.

[nuancebydefault]

From experience I found the feeling of being in love without being loved back, is very close to the feeling of grief for a passed away loved one.

So in summary, both are an excess of love not finding its goal.