“I think what gets a poem going is an initiating line.”

“Sometimes a first line will occur, and it goes nowhere; but other times—and this, I think, is a sense you develop—I can tell that the line wants to continue. If it does, I can feel a sense of momentum—the poem finds a reason for continuing.... The first few lines keep giving birth to more and more lines. Like most poets, I don’t know where I’m going. The pen is an instrument of discovery rather than just a recording implement. If you write a letter of resignation or something with an agenda, you’re simply using a pen to record what you have thought out. In a poem, the pen is more like a flashlight, a Geiger counter, or one of those metal detectors that people walk around beaches with. You’re trying to discover something that you don’t know exists, maybe something of value.”

Said Billy Collins, interviewed by George Plimpton in The Paris Review in 2001.