Examine Thy Teacher...Vimamsaka Sutta

In the Vimamsaka Sutta, the Buddha tells his followers:

"Bhikkhus, by the Bhikkhu who could examine the thought processes of another the Thus Gone One [Tathagata] should be examined on two things. On things cognizable by eye consciousness and ear consciousness. Are defiled things cognizable by eye and ear consciousness evident in the Thus Gone One[Tathagata] or are they not? ..."

Now, isn't that amazing, how a teacher urges his students to examine even him?