The last of George Keithley's "Six Fragments from Johannes Kepler's Last Letter to Galileo" begins as follows:

Like all men who think, I struggle
against my nature.

The enjambment gives this an extra twist, allowing for two readings of Kepler's struggle, one general, the second a more specific "struggle / against my nature."

But I disagree with the more specific reading: for me, thinking can be a struggle, but not one "against my nature"!

Keithley does not leave it at that, of course. Here's the whole sixth "fragment":

Like all men who think, I struggle
against my nature. Wherein
I acknowledge what I hear
or dream is but the ghost
of those heavenly harmonics
that move the mind to dance:
Why not, then, call it music
and admit our souls are lost?

I struggle to think about those lines, about how to comment on them—but I don't struggle to feel them.

(Still, "just because you feel it doesn't mean it's there," as the Radiohead song goes ...)