He believed that purposive final causes guided all natural processes; this teleological view justified his observed data as an expression of formal design.
hiː bᵻlˈiːvd ðæt pɜːpˈoʊsɪv fˈaɪnəl kˈɔːzᵻz ɡˈaɪdᵻd ˈɔːl nˈætʃɚɹəl pɹˈɑːsɛsᵻz; ðɪs tˌɛlᵻəlˈɑːdʒɪkəl vjˈuː dʒˈʌstᵻfˌaɪd hɪz əbzˈɜːvd dˈeɪɾə æz ɐn ɛkspɹˈɛʃən ʌv fˈɔːɹməl dɪzˈaɪn.