Musar su Ecclesiaste 7:2

But just as reflection in this matter causes one to acquire the trait of Separation, so too does ignoring it cause its detriment. Frequenting the aristocrats and the affluent who run after honor and increase vanities. For when one sees their honor and grandeur, it is impossible for lust to not be roused within him to covet them. And even if he does not allow his Evil Inclination to defeat him, nevertheless he will not escape a battle and will thus be in danger. This is as Shlomo said: "It is better to go to a house of mourning than to go to a house of feasting" (Kohelet 7:2).

This is as they said regarding Rabbi Eliezer: "he would expose one handbreadth and conceal two, and was as one compelled by a demon" (Nedarim 20b). He would not derive any enjoyment whatsoever, and would perform the act only with intent to the mitzva and divine service. Shlomo said on this: "Know Him in all your ways, and He will straighten your paths" (Mishlei 3:6).