ɪnðə bˈʊk hiː kəmpˈɛɹd spˈɑːks lˈaɪf tə hɪz ˈoʊn, ɪn ˈɔːɹdɚ tʊ ɛksplˈeɪn ðə dˈɪfɹənsᵻz bᵻtwˌiːn ðə pɜːsˈoʊnəz ʌvðə tˈuː.
In the book he compared Spock's life to his own, in order to explain the differences between the personas of the two.