Duncan's lines in scene 4 and 6 show that he is a just and noble king, and that he respects his subjects as well as being respected by them. In scene four, when he welcomes Macbeth and Banquo back from the battle he makes sure that he praises both of them equally. He also shows how he is going to treat them, comparing Macbeth to a tree that he has planted and "will labor to make...full of growing". This shows that he is going to invest time, patience, and care into Macbeth and Banquo. His lines in scene six again show that he cares about all of his subjects. He compliments the castle and Lady Macbeth, instead of just ignoring her as the woman of the house.