The phrase "what does not kill me makes me strong" comes from Nietzsche in the book "Twilight of the Idols". A book in which he criticizes christianity, going a

The phrase "what does not kill me makes me strong" comes from Nietzsche in the book "Twilight of the Idols". A book in which he criticizes christianity, going as far as comparing it to alcohol as the great narcotic of Europe. Nietzsche, IMO, was the sort that believed that suffering was sort of part of human experience. But not necessarily suffering as in pain, just any form of hardship you might encounter. A lack of suffering would be exemplified by the last men, a group of humans that eliminated all suffering, hardship or negativity in their lives, who take no risks and only seek comfort. (It's a fictional society made up by Zarathustra, a fictional character in Nietzsche's books, as the most disgusting example of the goals of western civilization)