How a real philosophical science is distinguished from merely formulaic philosophy
The character of rationality consists in the fact that which ACTS and that which is ACTED UPON are one and the same; and with this description, the sphere of REASON as such is exhausted.
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What exists FOR a rational being exists IN the rational being; but there is nothing in the rational being except the result of its acting upon itself :
what the rational being intuits, it intuits within itself; but there is nothing in the rational being to be intuited except its OWN acting :
and the I itself is nothing other than ACTING UPON ITSELF.