Being modest and humble is a morally commendable approach in life, but it is not usually the most productive in terms of personal success.

(personal) genitive of sie: of her, of them

(possessive) inflection of ihr (“her, their”):
/ (possessive) inflection of ihr (“her, their”):
/ (possessive) inflection of ihr (“her, their”):

inflection of ihr:
/ inflection of ihr:

dative masculine/neuter singular of ihr: her, its, their (referring to a masculine or neuter object in the dative case)

inflection of ihr:
/ inflection of ihr:

yours (polite/formal; both singular and plural)

genitive of Sie (addressing politely or formally one or more people)

inflection of Ihr:
/ inflection of Ihr:

(of a woman) having her menstruation