This is clearly the main point of the Trace Gate, or first half of the Lotus Sūtra. In chapter two of the Lotus Sūtra, the Buddha begins the teaching of the One Vehicle. In the very first part of that chapter he speaks of the “ten suchnesses” which are the ten factors” in Zhiyi’s teaching of the “three thousand realms in a single thought-moment.” … [T]hese ten factors show what the ten realms have in common that allows them to contain one another as different states in the ongoing dynamic process of interdependent becoming. Since they contain one another, the realm of buddhahood is embraced by and embraces the other nine realms. This means that buddhahood is an integral part of all and is realizable by all. Knowing this, the Buddha used various skillful means to teach people how to realize the different goals that appealed to them, but his true intention was that all those he taught would realize their own buddhahood. After being requested to do so three times by Śāriputra, the Buddha then clarifies that the three vehicles of the śrāvakas, pratyekabuddhas, and bodhisattvas were taught as a form of skillful means and that in fact there is only the One Vehicle that leads all to buddhahood. From chapter two to chapter nine the One Vehicle is expounded in terms of the parable of the burning house, the parable of the wealthy man and his poor son, the simile of the herbs, and others. In chapter seven, the Buddha tells the assembly how he has been teaching them the Lotus Sūtra in his capacity as a bodhisattva as long ago as “three thousand dust mote eons.” In these chapters, the Buddha gave predictions of buddhahood to major śrāvaka disciples such as Śāriputra, Maudgalyāyana, Mahākāśyapa, and many others, including his son Rāhula. In chapter thirteen he predicted buddhahood for his wife Yaśodharā, and his aunt Mahā-Prajāpatī who were also śrāvakas. Many of those the Buddha gave predictions too were arhats, those who had already cut off any ties to the world of birth and death and who therefore were not ever going to be reborn again. Throughout the Trace Gate the Buddha makes it very clear through plain statement, the use of parables, a past life story, and specific prophecies that even those who are following the way of the two vehicles will also attain buddhahood.