Perception (n.) is always of a cause: everything we perceive is perceived as the cause of an effect we have felt — which is why two eyes see one thing.
Perception (n.) is the sun's direct light and concepts the moon's borrowed light; while we only perceive, all is clear and we find rest and satisfaction in the present.
Perception (n.) is never just the perception an object, it is always the perception of an object set against the subject. In short, the subject/object duality is the universal condition of all that appears.
Perception (n.) is where original thought goes back: it is the fountain-head of all concepts, and every genuine theorem has some single momentary intuition at its root, like one drop of reagent tinging a whole solution.
Perception (n.) is intellectual, not sensory: the eye only delivers dull data, and the understanding, leaping from effect to cause, makes a world appear at one stroke, like the sunrise.