The Being-for-itself (n.) is defined as being what it is not and not being what it is.
4 definitions
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Being-for-itself (n.) is a being that returns to itself out of all its changing determinations, as the I persists through every object and trait it has.
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The Being-for-itself (n.) is never attained by natural things; restricted to being-there, they are always just being-for-another — man alone knows himself as 'I'.
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The Being-for-itself (n.) is where qualitative being finds its consummation — infinite being, negation of negation as simple self-relation.