Actress Lisa Ray who calls herself a cancer graduate says she values time much more than before. Time is a measure of precious moments of our lives. As a cancer graduate I value time much more than before. Time is the most precious quality in the world today - we are all challenged to find more of it Lisa told IANS over an e-mail interaction from Mumbai. Read: Maintaining proper hygiene can help to reduce the risk of cervical cancer The actress who in 2009 was diagnosed with multiple myeloma a cancer of the white blood cells known as plasma