What is the quotation at the head of the grand staircase at Central Library?

The following words are imbedded in the wall at the head of the staircase on the second floor of the Central Library and were written by American author, Clarence Day.  The Central Library opened in June 1965.

The World of Books…
Is the most remarkable creation of man
nothing else that he builds ever lasts
monuments fall
nations perish
civilizations grow old and die out
and after an era of darkness
new races build others
but in the world of books are volumes
that have seen this happen again and again
and yet live on
still young
still as fresh as the day they were written
still telling men’s hearts
of the hearts of men centuries dead.

Clarence Day
Dedicated June 1965

Source: Tulsa Tribune, May 22, 1965; Tulsa Tribune, June 29, 1965