Suguro's book presents a groundbreaking reexamination of early
Yogācāra Buddhist philosophy, challenging the conventional understanding of how the school developed. Rather than accepting the traditional view that the Yogācāra school began with a unified set of teachings from Maitreya, Asaṅga, and Vasubandhu that later branched into different interpretations, Suguro argues that early Vijñaptimatra philosophy was inherently diverse and fluid from its inception. He contends that what scholars have attributed to these founding figures actually represents a collection of varied doctrinal strands that were brought together over time, rather than a coherent system created by individual authors. The book addresses the significant problem of uncertain authorship among the seven major treatises traditionally attributed to Maitreya, noting that different Buddhist traditions (Chinese and Tibetan) assign these works to different authors entirely. Suguro proposes that to truly understand the fundamental structure of Vijñaptimatra theory, scholars must abandon the assumption of early doctrinal fixity and instead recognize that this philosophical tradition was still developing and evolving during its formative period. His methodology involves analyzing the philosophical content of these disputed texts and making comparative studies of their teachings to reconstruct the actual historical development of early Yogācāra thought.