I learned slowly. First, I learned to be in small groups, to do difficult routes in small groups without tents, without Sherpas, without oxygen, and so on. I needed a long time to be able to climb an 8,000-meter peak solo. Because being solo, you cannot divide fear, you cannot divide the work you have to do up there. And the solo climb of Nanga Parbat in ’78 is much more important than the solo climb of Everest because it was the mountain where I learned it. And especially, I did a totally new route on a high wall on Nanga Parbat, and the first time — not only for me, for the whole climbing community — somebody did an 8,000-meter peak solo. And the problem was not a technical problem, not a logistical problem. It was a mental problem — to be able to handle, to be on the end of the world in very dangerous situations by yourself, not being able to speak with anybody, not being able to exchange experiences, not being able to divide fear. If you are together, fear is only half. If you are with one man, only half. If you are three, it’s only a third.