SimchaMinute by Rabbi Avigdor Miller
All these juvenile and childish attitudes are the dirt — the dirt of materialism, the dirt that the nations have put into Jewish minds. Studying Torah will cleanse the mind, but only if we use it that way. Otherwise, it will mingle with this dirt and get tainted, like what happened to Acher.
However, when people commit themselves to cleansing their minds and freeing themselves of all anti-Jewish prejudices, they will be ready to receive the great teachings of the Torah. — Most Beautiful Nation