But this does not account for his feverish anxiety to understand time. Why such anguished appeals to God to allow him to understand? What is at stake for him? I suggest that Book 11 should be read as a sequel to Book 10. In Book 10, he finds the self in memory. He found the power of memory terrifying . . . and this thing is the mind, and this thing is myself (10.17). In Book 11, he locates the self in time. Memory and time are intimately connected; memories occur in time but remain, across time,