 For Schopenhauer, the world we experience is constituted by objectifications of Will that correspond first, to the general root of the principle of sufficient reason, and second, to the more specific fourfold root of the principle of sufficient reason. This generates a two-tiered outlook (viz., Will [= reality] vs. objects-in-general [= appearance]), that articulates into a three-tiered outlook (viz., Will [= reality] vs. universal, non-spatio-temporal objects vs. individual, spatio-temporal objects), by further distinguishing between universalistic and individualistic levels within the sphere of objects. 