conscious and sub-conscious

[Learning_English]

What is the difference between (conscious and sub-conscious)?

In other words, I can't understand meaning of sub-conscious on many occasions.

Could you help me?
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Please let me know if I have made any mistakes in any of my sentences.

[Mister Micawber]

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A conscious act is one that the actor is aware of; it is performed with aforethought.
A subconscious act is one that the actor is unaware of; it is performed perfunctorily or instinctively.
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Native English teacher at Mister Micawber's