Culminating Realization, and the Three Vehicles' Realization

T1606 simply confirms the cross-reference: culminating realization is the vajra-like concentration, the permanent stilling of every coarse heaviness, and the full attainment of freedom-from-bondage already examined in careful detail across Parts 67 through 69. Nothing further is added here, since that earlier treatment already covers this seventh realization completely.

T1606 explains precisely why the bodhisattva's own realization takes this distinctive, deliberately withheld form: bodhisattvas, for two specific reasons, cultivate the same forbearance toward the seven realizations that a śrāvaka or pratyekabuddha would use to directly verify and attain them, but stop short of that direct verification itself. First, in order to become genuinely skilled in the specific methods needed to guide and train śrāvakas and pratyekabuddhas — a skill best developed by deeply understanding their path from the inside without actually taking the exit it offers. And second, out of compassionate concern for sentient beings, since fully verifying these seven realizations in the śrāvaka or pratyekabuddha manner would mean actually departing through their more limited vehicle rather than remaining engaged with beings still needing guidance. It is specifically upon reaching the first bodhisattva ground, Utter Joy, that this same certainty of correctness — the very entry point already examined for the śrāvaka in Part 87's account of stream-entry — is instead attained through the bodhisattva's own distinctive path, forbearance cultivated to its fullest without the final step of direct verification a śrāvaka would take.