Take a quick look around the web, if you care to, and see how many pages of recipes tell you to "Remove the chilli seeds for a milder dish", or claim theat "The seeds are the hottest part of the chilli."
Man, a lot of people are wasting a lot of time out there: The seeds contain no capsaicin, the chemical that causes the "heat", at all. They are the mildest part of the chilli!
(It's true that the pith around them is the hottest, and if you happen to scrape that off while removing the seeds, you do getter a milder product. That may be where the "seeds are the hottest" legend comes from.)