Sādhumatī-bhūmi

sādhuṃatī-bhūmi (T. legs pa'i blo gros ལེགས་པའི་བློ་གྲོས་; C. shanhui di) is translated as the "perfect intellect ground," "auspicious intellect ground," etc. It is the ninth of the ten bodhisattva grounds (bhumis) according to the presentation in the Dasabhumika-sutra of the Sanskrit Mahayana tradition.

On this ground, the bodhisattva practices the ninth perfection, the perfection of power (bala-pāramitā).

Peter Harvey states:

In the ninth stage, the Bodhisattva perfects his power, using his tremendous insight into beings’ characters to guide and teach them in the most precisely appropriate ways.

Practical Ethics states:

As they are close to buddhahood, ninth ground bodhisattvas are like royal heirs who will soon be enthroned as monarchs. They excel in the four specific perfect understandings — the Dharma, its actual words, its meaning, and confidence or eloquence in expounding the Dharma — that, while not the same as the buddhas’ understandings, are concordant with them. This ground is called Excellent Intelligence because these bodhisattvas have attained an exceptional practice of those four. The ripening result is being able to take rebirth as a Brahma lord over a million worlds.

When people ask these bodhisattvas questions, they are able to reply correctly without mistakes or contradictions between the explicit and implicit meanings or between earlier and later statements. Of course these bodhisattvas are not able to answer in the totally unmistaken and perfect way that buddhas do, but because they are so close to the buddhas’ ground, they are extremely capable of accomplishing the aims of sentient beings by resolving their qualms and teaching them in accordance with their dispositions, thoughts, and interests. In this respect these bodhisattvas cannot be surpassed by arhats.

Sources

• Buswell, Robert E.; Lopez, Donald S. (2014), The Princeton Dictionary of Buddhism, Princeton University 
• Jampa Tegchok (2017), Thubten Chodron, ed., Practical Ethics and Profound Emptiness: A Commentary on Nargarjuna's Precious Garland, translated by Carlier, Steve, Wisdom Publications 
• Harvey, Peter (2013), An Introduction to Buddhism (Second ed.), Cambridge University Press