That's the craziest part of it all
In your rational mind, you only know two things for sure
One is that you're totally nuts
And the other is that you're the only one with the cure

from Eyedea (Ft. Dj Abilities) – The Dive (a) Lyrics on Rap Genius

Meaning

You’re the only person that can help yourself, and that’s the most insane part of it all. In your rational mind, as opposed to your obsessive thinking, you know only that you’re thinking irrationally and obsessively, and the other is that only you can help yourself.

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