And treating poetry as a performing art emphasizes its ephemerality. A printed poem can be endlessly reprinted, photocopied, scanned, uploaded, cut and pasted - but a performance, even if somebody's there with a video camera, is one time only: the audience experiences something that won't exist when the performance is over, and which won't ever be reproduced in exactly the same form. I find that appealing.

For me, poetry is a way of thinking, and like many poets, I'm driven by the idea of trying to find the impossible, perfect words: the words that will hold my subject.

I like poems that affect me emotionally and also provoke me to further, deeper thought. I enjoy challenge, but not, I think, for its own sake.

My dad, a mathematician, raised me to believe that mathematics is beautiful, so math is a part of my imaginative terrain. In my late 20s I wrote several 11-line poems because I wanted to create poems that couldn't be uniformly divided into couplets, tercets, or quatrains, 11 being a prime number.

Years ago I used to set my alarm for 4 am, so that I could wake up in the middle of a dream and move directly into writing. I guess my favorite poems contain a mixture of intuitive and analytical thought.

I want each poem to be ambiguous enough that its meaning can shift, depending on the reader's own frame of reference, and depending on the reader's mood. That's why negative capability matters; if the poet stops short of fully controlling each poem's meaning, the reader can make the poem his or her own.

I'm a mix; I'm sure some of my Canadian friends find me very American, both in person and on the page.