Answer:
I am never quite what I appear to be. Straight-forward I seem, but it's only skin deep. For mystery most often lies beneath my simple speech. Sharpen your wits, open your eyes, look beyond my exteriors, read me backwards, forwards, upside down. Think and answer the question...
What has four wings but cannot fly and uses the wind but does not know why?
You use it between your head and your toes, the more it works the thinner it grows.
What do you fill with empty hands?
Though I wander the earth, I am no longer here. I am pale and I chill everyone near. Who am I?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?