1. The speaker felt that it was a light-hearted job to give a commencement address at the graduation ceremony.
2. She has been racking her brains for the content of the address.
3. The Harvard graduates are so talented and intelligent that they have never known hardship or heartbreak.
4. Seven years after graduation, the speaker underwent a total failure — being divorced, jobless, homeless and poor.
5. Failure in her life, on the contrary, inspired her strong determination to succeed in the area she truly belonged.