"That's Just How I Am!"

SimchaMinute by Rabbi Avigdor Miller 

We’re responsible for our character. Don’t say, “That’s how I am!” That’s untrue.

We have free will and we’re able to control our characters. For middos (character traits) everybody is accountable, men and women and boys and girls. Character, that’s the touchstone, that’s the test by which all mitzvos are measured and all aveiros (sins) are measured. — The Complainer (#379)