"Grief and love are forever intertwined," said Nick Cave in an emotional online exchange to a fan about the death of his son Arthur.
The singer, who performs with The Bad Seeds, shared the letter on his website the Red Hand Files after US fan Cynthia asked whether Cave ever felt that Arthur was with him or his wife, Susie Bick, and communicating in some way.
"I have experienced the death of my father, my sister, and my first love in the past few years and feel that I have some communication with them, mostly through dreams. They are helping me," she wrote.
Cave thanked her for asking her "very beautiful question".
He goes on to share his ruminations on love, grief and change.
"I feel the presence of my son, all around, but he may not be there. I hear him talk to me, parent me, guide me, though he may not be there," he wrote.
The 15-year-old fell from a cliff in Ovingdean Gap in the English seaside town of Brighton in 2015.
In his letter, Cave explained that Arthur visits Susie in her sleep, speaks to her and comforts her.
He described grief as a non-negotiable, terrible reminder of the depths of love.
"It seems to me, that if we love, we grieve. That’s the deal. That’s the pact.
"Dread grief trails bright phantoms in its wake. These spirits are ideas, essentially. They are our stunned imaginations reawakening after the calamity."
He says that like ideas, "spirits speak of possibility", as well as change, growth and redemption.
He explains that spirits are created by our imaginations, and implores his fan Cynthia to create and will those spirits alive to help lead her out of darkness.
"We are tiny, trembling clusters of atoms subsumed within grief’s awesome presence," he wrote.
"It occupies the core of our being and extends through our fingers to the limits of the universe. Within that whirling gyre all manner of madnesses exist; ghosts and spirits and dream visitations, and everything else that we, in our anguish, will into existence.
"These are precious gifts that are as valid and as real as we need them to be. They are the spirit guides that lead us out of the darkness."
In September, Cave suffered another loss when his bandmate 58-year-old pianist and keyboardist Conway Savage died from a brain tumour.
His 2016 album Skeleton Tree was touched by the effects his son's death had on him, as did the documentary film One More Time with Feeling, which documented the recording of the sixteenth studio album.