sense pluse drive ought to equal play

sphere of knowledge
Material Drive:: concerned with reality
Formal Drive: concerned with necessity of things

sphere of action
Material Drive: preservation of life
Formal Drive: maintenance of dignity

both drives aim towards truth and perfection

According to this explanation, if such it be, then the term beauty is neither extended to cover the whole realm of living things nor is it merely confined to this realm. A block of marble, though it is and remains lifeless, can nevertheless, thanks to the architect or the sculptor, become living form; and a human being, though he may live and have form, is far from being on that acount a living form. In order to be so, his form would have to be life, and his life form. As long as we merely think about his form , it is lifeless, a mere abstraction; as long as we merely feel his life, it is formless, a mere impression . Only when his form lives in our feeling and his life takes on form in our understanding, does he become living form; and this will always be the case whenever we adujdge him beautiful.

But because we know how to specify the elements that when combinde produce beauty, this does not mean that its genesis has as yet in any way beene xplained; for that would require us to understand the actual manner of theri combining, and this, like all reciprocalaction between finite and infinite, remains for ever inaccessible to our probing.

Schiller moves on to explain that without the combining of these two drives (form and material) human nature is incomplete and gives rise to limitation within it.

But how there can be beauty, and how humanity is possible, neither reason nore experience can tell us.

Play: everything that is neither subjectively nor objectively contingent, and yet imposes no kind of constraint either from within or from without.

man only plays when he is in the fullest sense of the word a human being, and he is only fully a human being when he plays.