There's no 'mystery' (to/as to/about) why we're here. = It's no 'mystery' why we're here. [=we know why we are here]
His success is something of a 'mystery'. = His success is a bit of a 'mystery'.
We'll reveal the identity of today's 'mystery' guest after these commercials.
(..) may be surrendered and come back for cooking barley surrender .. No surrender Noodle not Noodle you worried by what was often and what will There is a saying Yesterday is history tomorrow is a mystery but today is a gift - this is called the present - the gift not - What happens? -- fired fired (..)2008 Kung Fu Panda