Fear, like in all religions. In abrahamic religions people take the &quot;Hell&quot; story seriously. It&#x27;s to be avoided as nobody wants the eternal torture. Now the eternal torture in the religions which believe in cyclical births and deaths is simply this thing of permanent new births and deaths! Therefore, as long as the body doesn&#x27;t decay, the cycle doesn&#x27;t repeat and that&#x27;s the achievement.