Epicureans reforming our irrational beliefs such as our fear of death, in order to reach happiness

Like the Stoics, Epicureans were keen on leading us to happiness by reforming our false and irrational beliefs, like our fear of death. What sorts of practices do they urge us to adopt to make our lives better? Do you agree with them that it is in our power as rational agents to dismiss irrational beliefs, so that they no longer bother us? Why or why not? Provide examples to support your argument.

Based on this reading:
https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cicero/de_Finibus/1*.html