The question of source- quite a big topic isn't it?
Let us take a lamp, as an illustration of logic.
We turn it on and there's light. Under them, we see, feel and act more vividly and visually than we could without it. Forms and contrasts are understood through this experience. It seems to compass our intuition and consciousness from within, with what's on the outside.
Dreams, are even imagined with these observations through light. Dream-catchers, on the other hand, try its very best to remind us the good in the bad.
We all seem to love more securely with an image in mind,
but what we often not do,
is to flip the switch of the lamp and open our eyes.