What surprised me most about the speech is the particular sentence Page boiled things down to, "Always work hard on something uncomfortably exciting." YC's one-

What surprised me most about the speech is the particular sentence Page boiled things down to, "Always work hard on something uncomfortably exciting." YC's one-sentence is "Make something people want". Any guesses as to why Page included the word "uncomfortably" in his one-sentence? My guess is that if the idea is big enough it's going to feel strange working on, because most people will believe it's impossible.