Many critics have interpreted Bob Dylan's lyrics, especially those composed during the middle to late 1960s, in the contexts of their relation to American folk, blues, and rock'n'roll precedents; their discographical details and concert performances; their social, political and cultural relevance; and/or their status for discussion as "poems." Dylan's Autobiography of a Vocation instead focuses on how all of Dylan's 1965-1967 songs manifest traces of his ongoing, internal "autobiography" in which he continually declares and questions his relation to a self-determined existential summons.