What line of reasoning does Yevgeny first use with his son about taking his tobacco, and why does it not get through to Seryozha?

In the story "Home" by Anton Chekhov, we learn about a boy and a father. The father, Yevgeny, is going to scold his son, Seryozha, for smoking.

The first line of reasoning that Yevgeny uses is that of being very angry. With a calm tone, Yevgeny tells Seryozha that he is very embarrassed of him, that he does not love him, and that he is no longer his son.

However, this does not get through to Seryozha. The boy is skeptical. This is a testament to the love that exists between them, as the boy knows that his father cannot be serious. Moreover, the father is not able to be as harsh as he wanted to be, by promising to kiss him after, and by sitting the boy on his lap.

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explanation:

imparadis't in one anothers arms  

the happier eden, shall enjoy their fill  

of bliss on bliss, while i to hell am thrust,  

where neither joy nor love, but fierce desire,  

among our other torments not the least,  

still unfulfill'd with pain of longing pines;  

yet let me not forget what i have gain'd  

from their own mouths; all is not theirs it seems:  

one fatal tree there stands of knowledge call'd,  

forbidden them to taste: knowledge forbidd'n?  

suspicious, reasonless. why should their lord  

envie them that? can it be sin to know,