Hi
i'm asked to write an analysis essay for a passage from pride and prejudcie novel for Jane Austen , but there are some sentences which i can't understand what it means . So i want you to help me if you can .
I will write here the passage and write the sentences which i can't understand between brackets

The passage is

"I say no more than the truth, and what every body will say that knows him," replied the other. Elizabeth thought this was going pretty far; and she listened with increasing astonishment as the housekeeper added, "I have never had a cross word from him in my life, and I have known him ever since he was four years old."

This was praise, of all others most extraordinary, most opposite to her ideas. That he was not a good tempered man had been her firmest opinion. Her keenest attention was awakened; she longed to hear more, (and was grateful to her uncle for saying, )

("There are very few people of whom so much can be said. You are lucky in having such a master.")

"Yes, Sir, I know I am. If I was to go through the world, I could not meet with a better. But I have always observed that they who are good-natured when children are good-natured when they grow up; and he was always the sweetest-tempered, most generous-hearted, boy in the world."

Elizabeth almost stared at her. -- "Can this be Mr. Darcy!" thought she.

"His father was an excellent man," said Mrs. Gardiner.

"Yes, Ma'am, that he was indeed; and his son will be just like him -- just as affable to the poor."

Elizabeth listened, wondered, doubted, and was impatient for more. Mrs. Reynolds could interest her on no other point. She related the subject of the pictures, the dimensions of the rooms, and the price of the furniture, in vain. Mr. Gardiner, highly amused by the kind of family prejudice to which he attributed her excessive commendation of her master, soon led again to the subject; and she dwelt with energy on his many merits, as they proceeded together up the great staircase.

"He is the best landlord, and the best master," said she, "that ever lived. Not like the wild young men now-a-days, who think of nothing but themselves. There is not one of his tenants or servants but what will give him a good name. Some people call him proud; but I am sure I never saw any thing of it. To my fancy, it is only because he does not rattle away like other young men."

("In what an amiable light does this place him!" thought Elizabeth. )
("This fine account of him," whispered her aunt, as they walked, "is not quite consistent with his behaviour to our poor friend." )

("Perhaps we might be deceived." )

("That is not very likely; our authority was too good.")