This is the night when in the ancient Past,
The Herder Star embarked to meet the Weaving One;
In its sweet remembrance the wave rises high in the River of Heaven.
Even so swells my heart to see the famous book.

The answer was:

The star gods meet on the shore of the Heavenly River,
Like theirs full of ecstasy is my heart
And grave things of daily life are forgotten
On the night your message comes to me.