Answer:
It is sometimes known to have silver linings.
What comes once in a minute, twice in a moment, but never in a thousand years?
Take off my skin, I won't cry, but you will.
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...
Until I am measured I am not known, Yet how you miss me when I have flown.
I have two eyes in the front and a lot of eyes on my tail