Halakhah su Genesi 9:21

(2) And he [the speaker of lashon hara] also transgresses (Vayikra 19:18): "And you shall love your neighbor as yourself," whereby we have been commanded to be as solicitous for our friend's money as we are for our own, and to be solicitous of his honor, and to speak in his praise, as we are solicitous for our own honor. And if one speaks or receives lashon hara and rechiluth against his friend, though it be true, it is apparent that he does not love him at all — how much more so is he in violation of "as yourself!"
And the great proof of this [that he is in violation of "as yourself"] is as follows: Does not every man know his own shortcomings? — in spite of which he would not want his friend to know, under any circumstances, even one thousandth of them! And even if it happens that a few of his faults become known to his friend, who goes and speaks of them to others — how he stands and waits, wishing the L–rd to grant that they not accept his words and not believe him! And all so that he not be seen in their eyes as unworthy — even though he knows himself to be guilty of very many sins, far more than his friend has revealed. In spite of this, in the access of his self-love, everything is swept away. Thus, exactly in this way must one conduct himself vis-à-vis his friend according to the Torah, to be solicitous of his honor in every respect.
And not in vain did the Torah relate to us the episode of Noach, viz. (Bereshith 9:21-23): "And he drank from the wine and he was inebriated and he uncovered himself in the midst of his tent. And Cham the father of Canaan saw the nakedness of his father and he told his two brothers outside. And Shem and Yefeth took the garment and placed it on the shoulders of both and they covered the nakedness of their father, and their faces were [kept] turned backwards [when they drew near him to cover him], and the nakedness of their father they did not see." And the Torah also relates to us the blessing by which Noach blessed them (viz. Ibid 26-27) and which was ultimately realized — to reveal to us the greatness of this attribute, that one must cover up any unseemliness in his friend with all of his power, just as he would for himself!

(2) And he [the speaker of lashon hara] also transgresses (Vayikra 19:18): "And you shall love your neighbor as yourself," whereby we have been commanded to be as solicitous for our friend's money as we are for our own, and to be solicitous of his honor, and to speak in his praise, as we are solicitous for our own honor. And if one speaks or receives lashon hara and rechiluth against his friend, though it be true, it is apparent that he does not love him at all — how much more so is he in violation of "as yourself!"
And the great proof of this [that he is in violation of "as yourself"] is as follows: Does not every man know his own shortcomings? — in spite of which he would not want his friend to know, under any circumstances, even one thousandth of them! And even if it happens that a few of his faults become known to his friend, who goes and speaks of them to others — how he stands and waits, wishing the L–rd to grant that they not accept his words and not believe him! And all so that he not be seen in their eyes as unworthy — even though he knows himself to be guilty of very many sins, far more than his friend has revealed. In spite of this, in the access of his self-love, everything is swept away. Thus, exactly in this way must one conduct himself vis-à-vis his friend according to the Torah, to be solicitous of his honor in every respect.
And not in vain did the Torah relate to us the episode of Noach, viz. (Bereshith 9:21-23): "And he drank from the wine and he was inebriated and he uncovered himself in the midst of his tent. And Cham the father of Canaan saw the nakedness of his father and he told his two brothers outside. And Shem and Yefeth took the garment and placed it on the shoulders of both and they covered the nakedness of their father, and their faces were [kept] turned backwards [when they drew near him to cover him], and the nakedness of their father they did not see." And the Torah also relates to us the blessing by which Noach blessed them (viz. Ibid 26-27) and which was ultimately realized — to reveal to us the greatness of this attribute, that one must cover up any unseemliness in his friend with all of his power, just as he would for himself!