system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer FB] Has anyone ever turned away from Chaos after embracing them?
gpt
Yes, in the Beastslayer novel of the Gotrek and Felix saga, the brother of duke of Praag is a Tzeentch cultist that is plotting to kill his brother and make the city fall to Chaos. Even though he sincerely loves his brother.   
The plan fails because he has a change of heart at the very last moment, and protect his brother from the assassins. Sadly though, his soul still belongs to Tzeentch, and the Chaos God punishes him for all eternity for his betrayal.   


Also, it's hinted that ALL Chaos Warriors conserve a minuscule fraction of humanity in their mind, and this human conscience is horrified by their actions and by Chaos itself. The apparent madness of the Chaos Warriors is mostly due to trying and silence this voice in their head with act of crazed violence.