I'm a pirate! None of that matters! If I say I can do it, then don't doubt that it can be done. It may well be that no other man could manage it, but I haven't the slightest bit of doubt in my own ability.

[If nothing else, Motochika's ego is completely indestructible. Even if he doesn't completely believe what he's saying at the start, he usually ends up saying it enough that he convinces himself. In this case, he at least knows for certain that he can build the sort of ship he's planning. It's detaching islands from the ocean floor that he hasn't figured out yet. Still, with the right amount of time, tools and manpower, he figures he should be able to make it happen.]