I never met my maternal grandfather -- he passed away before I was born. He was a wise, kind man. A devout Christian who also encapsulated, beautifully, the concept of mindfulness -- of living in the present -- with the saying "Today is the best day."
My mother has often said this to her children. For her, as well as my sister and me, it has become a sort of mantra, something to aspire to, to live by.