Tim Cook may be the leader of the most valuable company in the world, but he’s also got a sense of the past, and some of history’s greatest suffering.

During a visit to Yad Vashem, the World Holocaust Museum in the Israeli capital of Jerusalem, the Apple CEO was clearly touched by the gravity of the memorial.

According to the museum’s Facebook Page, Cook left a message that could presumably inspire future visitors to watch out for the signs of authoritarianism and the kinds of ruthless dictatorships, like the Nazis, that led to the Holocaust. Of course, those visiting Yad Vashem probably don’t need a reminder of the World War II catastrophe that led to the murder of more than 6 million Jews and millions of others.

“I will remember forever the people who tragically perished because of who they were and what they believed,” Cook wrote. “In their names, I share in the enduring hope that their memory will give light to humanity’s potential to work for a greater good; to be ever watchful for those who would threaten human rights and equality, and to strive for a better future.”

Cook’s visit to the museum was part of a trip to the Middle East to promote Apple’s new research and development center in Israel, according to the Cult of Mac.

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