Even in dialogue, your own style rules your selection. Do not give yourself a blank check of this kind: 'I'll merely reproduce what I think a character like so-and-so would say.' You have to reproduce it in the way your literary premises dictate.
Ayn RandA building has integrity, just as a man and just as seldom! It must be true to its own idea, have its own form, and serve its own purpose!
Ayn RandFrom the smallest necessity to the highest religious abstraction, from the wheel to the skyscraper, everything we are and everything we have comes from one attribute of man - the function of his reasoning mind.
Ayn RandFrancisco could do anything he undertook, he could do it better than anyone else, and he did it without effort. There was no boasting in his manner and consciousness, no thought of comparison. His attitude was not: 'I can do it better than you,' but simply: 'I can do it.' What he meant by doing was doing superlatively.
Ayn Rand