Subhūti, completely understanding the meaning and implications of the doctrine of no mark expressed in the Vajra Sūtra, wept. Tears flowed from his eyes and his nose ran. Usually people cry when they are sad or worried or when something unfortunate happens, but occasionally they also cry from joy, just as Subhūti then did. “Extreme happiness brings sorrow.” The Buddha expressed the depths of prajña so thoroughly that Subhūti was overjoyed at being able to hear the specific teaching, the wonderful dharma door of prajña. Subhūti realized that his former contentment with the Small Vehicle teachings had been misguided. His awakening may be thus expressed:

“Upon realization, I do not reproach myself for the past;
I know that in the future I can rectify mistakes.
Aware that I am not too far down the muddled path,
I have now awakened to today’s rights and yesterday’s wrongs.”

The Small Vehicle was Subhūti’s “muddled path,” and his further awakening indicates that his former attachment to Small Vehicle dharmas had not been very great, he had “not gone too far down the muddled path.” “Awakened to today’s rights and yesterday’s wrongs” means he had realized it was right for him to seek the Great Vehicle dharma, and that his former fondness for the Sound-Hearer fruit of the Small Vehicle had been a mistake. He greeted those realizations with great emotion, however, so he wept for joy and exclaimed, “How rare!”