what advice does Atticus give Jem and Scout

He gives Jem and Scout advice at different points in the novel. Some of Atticus's more famous bits of wisdom are,

"You never really understand a person until you consider things from his point of view - until you climb into his skin and walk around in it."

"The one thing that doesn't abide by majority rule is a person's conscience."

"Courage is not a man with a gun in his hand. It's knowing you're licked before you begin but you begin anyway and you see it through no matter what. You rarely win, but sometimes you do."

There are more and Atticus certainly models what he says.