```

[If the heart is like a rock, it can control ten thousand demons; if the mind is like duckweed, it will backfire and become a beast...]

[You've read the general outline of the Summoning Demon Scripture.]

[You feel that practicing this technique requires a will of iron. If one's will is not strong, even if they can forcefully practice through bloody means in the first three levels, by the fourth and fifth levels, they will still lose themselves and become bloodthirsty beasts.]