Lord Nagarjuna

Dear Dharma friends,
Where to cite this quote: Nāgārjuna in another place said that the seeker of the truth is told that ‘everything exists.’ Later he is told that ‘everything doesn’t exist.’ When his intellect is more matured he is told ‘everything both exists and does not exist.’ Finally he is told that ‘everything neither exists nor does not exist.’
Thanks for your support

Something to add (补充两句)

This seems to come from 'Kaccāyanagotta-sutta' of the Pali Canon. This sutta is related to Nāgārjuna because the latter quoted it for his exposition in the 'Mūlamadhyamakakārikā' about the middle way and right view. For further explanation, you may refer to the book 'Mālamadhyamakakārikā of Nāgārjuna - The Philosophy of the Middle Way' by David J. Kalupahana (Motilal Banarsidass Publishers, Delhi,. 1999). Page 9 - 16.

However, may you enlighten me, what does the above got to do with Bodhisattva Ideal?