Here is a quote, which is on page 30 in my book but definitely in chapter 3, is one of my favorites.
“First of all,” he said, “if you can learn a simple trick, Scout, you’ll get along a lotbetter with all kinds of folks. You never really understand a person until youconsider things from his point of view-”“Sir?”“-until you climb into his skin and walk around in it.”
Another example is his reaction to Boo Radley placing the blanket around Scout's shoulders during the fire.
“That’s all right, son.” Atticus grinned slowly. “Looks like all of Maycomb wasout tonight, in one way or another. Jem, there’s some wrapping paper in the pantry, I think. Go get it and we’ll—" (ch 8)
He agrees to not return the blanket, potentially getting Boo in trouble.
One of my favorites comes in Chapter 22 on the morning after the trial. Atticus awakens to find his kitchen table loaded down with gifts of food brought from Tom's friends.
Atticus's eyes filled with tears. He did not speak for a moment. "Tell them I'm very grateful," he said. "Tell them--tell them they must never do this again. Times are too hard."
Check the final chapter of the book, which has several examples of Atticus's kindness to others, particularly to Boo and to Scout. It's not surprising that Lee emphasizes Atticus's kindness as the book ends, since his kindness has been a main theme throughout the entire novel. He is a good and decent man (at least in the opinion of most readers), and so it is not surprising that he shows his goodness and decency several more times in this closing chapter.