Here is an excerpt:
"God proves to Jonah that if man is judged by the measure of strict justice, none of us will prevail. We try to do Teshuva, just like the people of Nineveh, but at times it is merely superficial, or short lived. And yet, God is merciful and renounces punishment. He forgives readily, even though the changes are neither thorough nor permanent. Mercy trumps Truth."