Answer:
When set loose I fly away. Never so cursed as when I go astray.
A shimmering field that reaches far. Yet it has no tracks, And is crossed without paths.
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
I am the outstretched fingers that seize and hold the wind. Wisdom flows from me in other hands. Upon me are sweet dreams dreamt, my merest touch brings laughter.
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
Before Google, we actually had to physically look things up in this building full of knowledge.