It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years.
“I want my candidacy for the presidency of the United States to stand for a moment when we the people, stand once again for the independence from a government that has gotten too big and spends too much and has taken away too much of our liberties.”
“The principles we live by, in business and in social life, are the most important part of happiness.”