楞伽阿跋多羅寶經註解 1.568

1.568

此結勸離二種見。又曰「當思惟自心現妄想」，欲知妄想有無之實，但當返觀自心是果有耶、果無耶？亦有亦無、非有非無？思之自得。亦當以此教導於他，故曰「隨入一切剎土」。最勝子，猶佛子也。

This concludes the exhortation to abandon the two kinds of views. It further says, 'You should contemplate the vikalpa appearing from your own minds': if one wishes to know the reality of the existence or nonexistence of vikalpa, one should merely reflect back on one's own mind: does it genuinely exist, or genuinely not exist? Does it both exist and not exist, or neither exist nor not exist? Contemplating this, one will realize it oneself. One should also teach others with this; hence it says 'entering accordingly into all lands'. 'Supreme sons' is equivalent to 'buddha sons'.