United Kingdom, July 23 -- Nick Cave says the pain of his son's death has "evolved over time".

Nick's 15-year-old son Arthur died in 2015 after falling from the Ovingdean Gap cliffs in Brighton, England and Nick explained how he and his wife Susie have been coping with their grief in the intervening years.

In a new letter on his theredhandfiles.com website, Nick said: "The pain remains, but I have found that it evolves over time. Grief blossoms with age, becoming less a personal affront, less a cosmic betrayal, and more a poetic quality of being as we learn to surrender to it. As we are confronted with the intolerable injustice of death, what seems unbearable ultimately turns out not to be unbearable at all. Sorrow grows richer, deeper,...