Musar su Geremia 3:5

Additionally, repentance is more difficult for one who repeats his sin; for the sin becomes as if it were permitted to him. And his sin is very weighty with regards to this, as it is stated (Jeremiah 3:5), "that is how you spoke; you did wrong, and you were able." The meaning of, "you were able," is that the evil deeds have become like that which is permitted to you, and like something within your ability and your authority - like the usage (in Deuteronomy 12:17), "You are not able to eat in your gates," for which the translation [of Onkelos] is, "you do not have authority." And our Rabbis, may their memory be blessed, said (Yoma 86b), "When a person commits a transgression and repeats it, it becomes to him as if it were permitted. [Additionally,] our Rabbis, may their memory be blessed, said about a man who commits a transgression and repeats it - that from now on, if he thinks about doing that sin but is prevented from doing it by duress, his bad thought is joined with the act (it is counted as if he did it). And about him is it stated (Jeremiah 6:19), "I am going to bring disaster upon this people, the outcome of their own thoughts."