 Similarly, it is a central theme of the Analogies of Experience in the first Critique that “absolute time”—“time itself” (B219), “time for itself” (B225), or “time in itself” (B233)—is no actual object of perception. Hence, the three “modes of time” (duration, succession, and simultaneity) must all be determined in and through perceptible features of the appearances. Kant calls this procedure “time determination” (more precisely, “the determination of the existence of appearances in time”), and he sums up his view as follows (A215/B262):