"What the Bird said early in the Year"

I heard in Addison's Walk a bird sing clear
"This summer will come true.  This year.  This year.
"Winds will not strip the blossom from the apple trees
"This year, nor want of rain destroy the peas.
"This year time's nature will no more defeat you,
"Nor all the promised moments in their passing cheat you.
"This time they will not lead you round and back
"To Autumn, one year older, by the well-worn track.
"This year, this year, as all the flowers foretell,
"We shall escape the circle and undo the spell
"Often deceived, yet open once again your heart,
Look, look, look, look! the gates are drawn apart

I said "This might prove truer than you know,
Some year.  And yet your singing will not make it so.

C.S. Lewis (1938)

There has been some discussion related to this poem over the years as two versions exist, see the copious web sites related to  Kathryn Lindskoog and this debate.