I saw them wither,
those who once laughed at me;
do they long for redemption today?
Your tears too fall like dew upon the meadows;
you weep! Look - the meadows laugh!
In effect Parsifal is saying to Kundry, do not weep but rejoice. He has heard the prayer spoken only in her heart.
Parsifal kisses Kundry gently on her forehead and distant bells begin to toll. It is now noon and the Spear of Destiny is about to be re-united with the Grail...
In 1858 Wagner wrote to Mathilde Wesendonk: "...if this suffering can have a purpose, it is simply to awaken a sense of fellow suffering in man, who thereby absorbs the creature's defective existence and becomes the Redeemer of the world by recognizing the error of all existence."
I also believe this is what the saviour stories teach us.