represent vain efforts to suppress one of the two fundamental forms of the spirit, or to derive them from a third, which consciousness does not reveal. [Sidenote: _Problem of the unity of this duality._] This however does not mean that the demand to conceive the link of that duality, or the unity of the theoretical and the practical, manifested in all these erroneous attempts, is not legitimate. But in order to conceive this, it is necessary to insist above all upon the reality of this duality, of which is sought the connection and the unity. [Sidenote: _Not the duality of opposites._] This connection cannot be the relation or synthesis of opposites. The theoretical is not the opposite of the practical, nor the practical the opposite of the theoretical: the opposite of the theoretical is error or the false, as the opposite of the practical is the volitional contradiction or evil. The theoretical, far from being negative, is positive, not less than the practical, and inversely. Neither form can therefore be in any way debased to a simple opposite. Opposition is intrinsic to the spirit and is to be found in each one of its forms: hence the general value of the spirit (activity against passivity, rationality and reality against irrationality and unreality, being against not-being) and that of its special forms (beautiful against ugly, true against false, useful against useless, good against evil). But precisely for this reason, it cannot constitute the character of one form in respect to the other: neither that of the true against the good, nor that of the beautiful against the useful, and so on. [Sidenote: _Not duality of finite and infinite._]