I wonder what it is they mean?

They mean humanity and the urge of it:

In the beginning and in the end the soul’s longing to be known, to know itself, and to know others;

And that means, in the beginning and in the end, the quest for love;

It is the ideal of love and the finding of it;

And the magic of it and the drain of disillusionment;

And the luxury of sorrow and the voluptuousness of suffering;

And the vacuum that is beyond death;

And the conviction that ideals are better than reality;

And the decision to live for “art”;