world of cause-awakened ones ［縁覚界］ ( engaku-kai): Also, realm of cause-awakened ones or world of realization. The eighth of the Ten Worlds and one of the four noble worlds. Cause-awakened ones ( pratyekabuddha) are those who awaken to the impermanence of all phenomena by perceiving the twelve-linked chain of causation or by observing natural phenomena. While they seek personal emancipation, they tend not to share it with others. For this reason, various sutras describe them as being reprimanded by Shakyamuni Buddha. When viewed as a state of life, the world of cause-awakened ones is a condition in which one perceives the transience of all things and strives to free oneself from the sufferings of the six paths, seeking to learn the way to self-improvement through personal effort and direct observation of the world. In this world, a sense of the impermanence of all things causes one to aspire for something eternal and unchanging. The world of cause-awakened ones and that of voice-hearers constitute the two vehicles. In The Object of Devotion for Observing the Mind, Nichiren states: “The fact that all things in this world are transient is perfectly clear to us. Is this not because the worlds of the two vehicles are present in the human world?” (358).