What does Faber say to Montag about the nights events? What does he say about being "old"?

These quotes from the book should suffice,

Pity, Montag, pity. Don't haggle and nag them; you were so recently one of them yourself. They are so confident that they will run on for ever. But they won't run on. They don't know that this is all one huge big blazing meteor that makes a pretty fire in space, but that some day it'll have to hit. They see only the blaze, the pretty fire, as you saw it.

"Montag, old men who stay at home, afraid, tending their peanut-brittle bones, have no right to criticize. Yet you almost killed things at the start. Watch it! I'm with you, remember that. I understand how it happened. I must admit that your blind raging invigorated me. God, how young I felt! But now-I want you to feel old, I want a little of my cowardice to be distilled in you tonight. The next few hours, when you see Captain Beatty, tiptoe round him, let me hear him for you, let me feel the situation out. Survival is our ticket. Forget the poor, silly women ....

(Part 3)