What we know:
It is stated in Chrono Cross that the human mind developed three times faster than it normally would have, because of contact with Lavos, probably through the Frozen Flame, and it was through the power of the Frozen Flame that the Zeal dynasty created their kingdom. And then, created the Mammon Machine.
Lavos supplied humanity with two things that led one, would have led to its own downfall, and two, which actually lead to its downfall: one being the intellect Lavos granted to humans to make to Mammon Machine, and two, magic which could also be used against Lavos.
My questions:
Why would Lavos give humans intellect that could be used against it, as well as magic that could be used against it?
How did Zeal get the idea that Lavos's life force could be extracted from its body and used as a power source?