Dogen spins a baseball + Jack takes poison pill

Back in Dogen's office, he is spinning a baseball and concentrating on it. It seems likely that he is using it to think about thinks, much like Sawyer says he reads books to do the same in season 5. On the table, there are some written pages and the top one is slightly visible, but at a bad angle. If anyone can translate the Japanese, leave a comment.

Jack comes in and says that Dogen speaks good English for someone who needs and translator. Dogen tells him that he doesn't need one and he does it to remain separate from the people he's in charge of because it makes it easier when they don't like the decisions he makes for them.

Dogen tells Jack that he was brought to the island like everyone else. When Jack questions what that means, Dogen says that Jack knows exactly what he means. This seems to spook Jack.

Jack once again questions what is in the pill and Dogen says that he can't explain. Dogen says that Jack needs to trust him and Jack says that he doesn't trust himself. Jack then tries to swallow the pill and Dogen quickly springs into action, hitting Jack in the chest and performing the heimlich maneuver until the pills comes out. Dogen then admits that it's poison.

So why exactly do they want to poison Sayid? What exactly did their previous "test" tell them?