How we cite our quotes: (Volume.Chapter.Paragraph.)
Quote #1
Keating did not care so long as his clients were impressed, the clients did not care so long as their guests were impressed, and the guests did not care anyway. (1.6.32)
Rand is hammering home the idea that happiness based on impressing others is futile—everyone here is trying to ultimately impress a group of totally clueless guests.
Quote #2
"May God bless you - or whoever it is that is alone to see the best, the highest possible to human hearts. You're on your way into hell, Howard." (1.11.14)
Cameron's warning here may not seem like it ties into the book's happiness theme, but this book takes happiness to mean a sort of passion that you can't live without, not merely feeling cheerful. Roark here is setting off to pursue his passion, even though it will be hard.
Quote #3
"You call that freedom?" "To ask for nothing, To expect nothing. To depend on nothing." "What if you found something you wanted?" "I won't find it. I won't choose to see it." (1.12.79-82)
Dominique contradicts herself here, as usual. She longs for freedom, which she takes to mean being free, literally, from everything. But she also refuses deliberately to see things she might want. As a result, she isn't free at all.