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The conscious processes and make all your decisions - except maybe impulses, as impulses do lead to outcomes such as "what the hell have I just done/bought???!!!". But my point is, the conscious mind is like the big brother that likes to prevent screw-ups.

The subconscious, is how you "bounce" away against a falling knife, is how you react while drowning, even sometimes an instinct to love/hate someone even when you don't know the person. Like an emergency button that activates and overwrites the conscious brain, when required (is. when the conscious brain is OBVIOUSLY too slow to THINK)

The thing is, we hardly know the subconscious. Maybe it's a part of us that we don't really want to know? It does come out and play, mostly in your dreams while your conscious is asleep, and also when your conscious brain is drunk beyond conscious, duh; so you may end up wallowing in tears, calling your ex at 2am in the morning? Yes, how embarrassing.

However, I believe deep down inside your subconscious, are hidden things that you wouldn't normally show the outside world, things that you felt so deep inside that you can never express, it's your deepest hopes and fears. Who knows, it could be the gateway to really understand the motivation behind, you.