(written from a Production point of view)
Delmore Schwartz was the author of "Calmly We Walk through This April's Day", the source of Dr. Tolian Soran's quote "Time is the fire in which we burn." in Star Trek Generations. This poem was found in his book In Dreams Begin Responsibilities.
Schwartz and his work ([In] Dreams Begin Responsibilities) were used by permission and credited as such at the end the film.