（Vn/ Bat-Chu Tam-Muoi） "The essence of this samadhi is that the Buddha is just the mind; the mind creates all Buddhas."
"The Pratyutpanna samadhi is to be performed in isolation. The meditator selects and adorns a hall for practice， prepares all the necessary accoutrements of offering， and lays out various delicacies， fruit， incense， and flowers. Having washed himself thoroughly， he changes into a new set of robes， which are to be worn at all times in the inner sanctuary where the practice is performed. Whenever he leaves this chamber to tend to necessities， he changes back into an older set. The practice itself lasts for a fixed period of ninety days， over the duration of which the meditator must continuously circumambulate an altar to the Buddha Amitabha. He vows never to entertain worldly thoughts or desires， never to lie down or leave the hall， and， aside from the time when he eats his meals， never to sit down or stop to rest until the three months are completed...The devotional element in this practice...undoubtedly plays a key role; however， as the practitioner becomes more skilled at constructing the mental image of the Buddha， the orientation of the visualization begins to shift radically. Eventually， the eidetic image of Amitabha loses its devotional character altogether and instead becomes the basis for a simple dialectical investigation into the nature of mind and the noetic act itself."
"When practicing this samadhi the cultivator has three powers to assist him: the power of Amitabha Buddha， the power of the samadhi and the power of his own virtues. The unit of practice of this samadhi should be ninety days. In that span of time， day and night the practitioner just stands or walks around， visualizing Amitabha Buddha appearing as a body standing on the practitioner's crown， replete with the thirty-two auspicious marks and the eighty beautiful characteristics. He may also recite Amitabha Buddha's name continuously， while constantly visualizing Him. When practice is perfected， the cultivator， in samadhi， can see Amitabha Buddha and the Buddhas of the ten directions standing in front of him， praising and encouraging him. Pratyutpanna is also called the 'Constantly Walking Samadhi.' As the practitioner walks， each step， each word is inseparable from the name of Amitabha Buddha. His body， speech and mind are always practicing Buddha Recitation without interruption， like a continuous flow of water. This method brings very lofty benefits， but only those of high capacity have the endurance to practice it. Those of limited o: moderate capacities or lacking in energy cannot pursue this difficult practice."
NOTE:
"In the Avatamsaka Sutra， the first spiritual advisor of the youth Sudhana （q.v.） taught him the 'samadhi of mindfulness of the Buddha' （i.e. Buddha Recitation Samadhi）. This was the first Dharma taught to Sudhana， for it appeals to all beings， whether of deep or shallow roots. Specifically， Bhikshu Cloud of Virtue， the first guru， expounded on the Pratyutpanna samadhi （Avatamsaka Sutra， ch. 39）."