Rabbi Nachman (Ben Faiga of Breslov) is quoted (see source below) as saying that by beautifying a wife to her husband you are causing them to separate.
How is one to understand this?
If I use the translation below I can guess that that the problem is that by doing this you are making her grater then him and you have the problem of (Yevamot 63a) "Come down a step in choosing your wife." ( A wife of superior position or rank might put on airs, or not be contented with her husband's social or financial position.) (רש''י נחית דרגא ונסיב איתתא. לא תקח אשה חשובה ממך שמא לא תתקבל עליה)
But it is still hard to understand, since it says in Ketubot 17a that calling a bride "Beautiful and graceful bride" is a good thing.
27 [or 17]. One who makes a separation between a man and his wife -- that is, he goes to the man and praises his wife to him, but goes to the wife and defames the husband in her eyes, until a separation is created between them -- he becomes troubled (preoccupied, overtaken) by his expenses (for food or sustenance)
כז. מִי שֶׁעוֹשֶׂה פֵּרוּד בֵּין אִישׁ לְאִשְׁתּוֹ, הַיְנוּ שֶׁהוֹלֵךְ לָאִישׁ וּמְיַפֶּה אֶת הָאִשָּׁה בִּפְנֵי הַבַּעַל, וְהוֹלֵךְ אֶל הָאִשָּׁה וּמְגַנֶּה אֶת בַּעְלָהּ בְּעֵינֶיהָ, עַד שֶׁנַּעֲשֶׂה פֵּרוּד בֵּינֵיהֶם, עַל יְדֵי זֶה נַעֲשֶׁה טָרוּד בִּמְזוֹנוֹתָיו
Please help me understand this quotation from Rabbi Nachman.