A dear friend is moving away, and that is sending all sorts of shock waves into my life. For one, she is going a long distance, and while her friends are promising to visit her after she is settled in her new home, we all know that’s not the same as being able to pick up the phone and set a time to get together later that day. Also lurking in the back of our minds is awareness that she will be out of reach should we need the vital help of a friend. While we are happy for her in her choice of a next chapter in life, we are selfish in viewing sadly our imminent loss of her regular companionship.

We have known each other, she and I, for almost 40 years. We met through the newspaper, as I have met so many wonderful people, and over time our friendship developed. We share a lot of the same interests: zipping into the city with tickets to the theater and enjoying a good dinner and glass of wine before or after the performance; lustily cheering on the Yankees in their stadium; wandering through museums to chuckle over the same funny exhibits; being in awe of James Levine as he conducts the Boston Symphony Orchestra at Tanglewood in Massachusetts; comparing notes after a fabulous concert by the Emersons at the Staller; playing competitive tennis singles in the good old days; and talking over problems with our children as they were growing up. The idea that she will not be easily available to share those activities makes me morose.

I am at the age where friends are, for one reason or another, leaving. While I lost my husband 28 years ago, I have always regarded that as an anomaly. Who expects one’s spouse to die at 50? But now we face a fearsome trend: Two close friends have died in the recent past, as have three first cousins; now one more friend is joining the parade of those moving away.

She is, of course, entitled to her own life. And while it is hard to forgive her for leaving, all her many friends and I understand why she is moving.

She has gone through the many-tiered ordeals of picking up roots and going elsewhere: getting her house ready and then putting it up for sale; researching movers and hiring one; sorting through her accumulated stuff of half a century and countless souvenirs dragged back from many trips in the world; taking care not to leave behind dental and medical records; shutting phone service and arranging to have mail forwarded — and heaven knows what else.

Then there is what I would imagine to be the hardest part of all: saying goodbye to longtime and maybe not-so-longtime friends.

As she ages, our friend doesn’t want to be a burden on anyone. This is one noble aspect of her character, and she believes she has found a solution to that perennial dilemma of every generation. Our times have provided facilities to meet the needs of the aging with assisted living, where an individual’s physical and mental requirements are met, even as they change with the years. And she is moving to a place where she will have her children nearby to oversee those needs but without having to be the primary caregivers. It sounds like a good deal.

Which drives the question home to the rest of us: How will we best cope with the inevitable infirmities of aging if we are lucky enough to live so long?

Reality is tough. Dealing with it is even tougher. My friend has implemented what she believes will be the least burdensome, most efficient solution for herself and her family. In so doing, she has underscored yet again her totally unselfish nature.

Not all of us are of such exalted character. We cling to our comfortable possessions and the familiar structure of our lives as if we could forestall change. But of course we cannot, and so each of us has eventually to come to terms with the endgame of our lives.

There is a fascination with stories about the Holocaust. Maybe it has to do with trying to understand pure evil. Maybe it is an exploration of the depths of man’s inhumanity toward man. Maybe it’s a terror that could happen again, to anyone who is somehow chosen to be a victim, and that could be any one of us. And just when one thinks, “Enough, I don’t have to read or see any more of these stories,” another one comes along, bringing its own compelling detail — and the fascination continues.

Elsewhere in this newspaper, in the Arts & Lifestyles section, there is an article about a film, recently shown at Suffolk County Community College, telling the story of a different Holocaust survivor. I’m writing today about Thomas Blatt, who died this past Tuesday at the age of 88, and who was one of those escapees from the Sobibor extermination camp after a massive revolt by the prisoners. I had never heard of this particular death camp, nor of an uprising there, and so I read his obit with interest.

Blatt was 15 and his brother just 10 when they were taken from their largely Jewish village in the Lublin district of Poland, along with their parents and neighbors, and put into a ghetto by the Nazis in 1942. From there, they were deported to Sobibor, where Blatt’s family was gassed immediately after arrival. For some reason, Thomas, who was fair and blue-eyed, was pulled out of line by one of the guards and given odd jobs to do, thus being spared his family’s fate. His jobs included fixing fences, burning documents, cutting the hair of women before they were herded into the gas chambers and sorting the victims’ belongings.

“I recognized my mother’s clothes and I realized my parents were no longer alive,” Blatt said.

Six months after he arrived, there was an uprising and mass escape from the camp, with some 300 prisoners running for their lives. Only some 60 managed to survive the war, including Blatt; the other escapees were hunted down and executed by the Nazis. There had been about 150 Ukrainian guards and 15 German SS officers at the camp, and many of them were killed in the escape. The site was knocked down and bulldozed by the Germans, who were trying to hide the death camp and the event. Blatt hid for almost a year until the advancing Russian troops pushed back the German army from Poland, despite having been shot in the jaw by a Polish farmer during the escape.

Blatt eventually emigrated to Israel in 1958 and the United States a year later, ultimately settling in Santa Barbara, Calif., where he lived with his family and owned three electronics stores. Years after he had arrived in America, he was asked to testify at the trial of alleged camp guard, John Demjanjuk, a retired autoworker who had been living in Ohio. Blatt wasn’t able to identify the accused, but he became a prominent witness for the prosecution with his many details about the brutality unleashed on the prisoners by all the Ukrainian guards. Demjanjuk was found guilty but died before his appeal could be heard.

“I never escaped from Sobibor,” Blatt said. “I’m still there — in my dreams and in everything. My point of reference is always Sobibor.” Described as “quiet and modest,” by a longtime friend, “Blatt suffered from recurrent nightmares and depression, and said, “Witnessing genocide is overwhelming; writing about it is soul shattering.” But according to his friend, he never harbored malice toward the Germans, the Ukrainians or those Poles who were anti-Semitic in his lifetime. He urged others to do the same. He worked tirelessly, traveling back and forth to Poland, to preserve the site of one of the few uprisings by Jewish inmates against Nazi guards during World War II.

Blatt was haunted by regret all his life for the last words he said to his mother just before they were separated at the death camp. “And you didn’t let me drink all the milk yesterday. You wanted to save some for today.” He fervently wished he could have instead hugged her and told her how much he loved her. Blatt, who wrote two books on the horrors of Sobibor, is survived by his three children, six grandchildren and four great-grandchildren.