Musar su Salmi 105:15

A human being’s humility should find its principle expression in the discretion he exercises before acting and his readiness afterwards to examine whether his deeds detracted in any way from Hashem’s honor or that of any of His creatures. Pride, by contrast, is displayed in the hastiness with which a person launches into all manner of evil and iniquitous deeds. In keeping with the dictum that “one sin leads to another” (Pirkei Avos 4:2), pride leads to avarice. The proud man thinks to himself, “I have so many admirable qualities, surely to me applies the verse, ‘Do not touch My anointed ones’ (Tehillim 105:15). Therefore no one should lay a finger on me and certainly not my wealth or property. But the only way to see that this is fulfilled is by living in isolation, apart from the company of other people.