In short, his whole voluntarism means that, while the inorganic world is mere object, all organization is congealed will, and all thinking is apperceptive will.
It is the analysis of an aggregate idea (Gesammtvorstellung) into subject and predicate; based on a previous association of ideas, on relating and comparing, and on the apperceptive synthesis of an aggregate idea in consequence; but itself consisting in an apperceptive analysis of that aggregate idea; and requiring will in the form of apperception or attention (Wundt).
According to him, inner decisive will, rising to active apperception, proceeds to what he calls " apperceptive combinations " (A pperceptionverbindungen); first to simple combinations of relating and comparing, and then to complex combinations of synthesis and analysis in imagination and understanding; in consequence of which synthesis issues in an aggregate idea (Gesammtvorstellung), and then at last analysis, by dividing an aggregate idea into subject and predicate, forms a judgment (see further Logic).