How can the knower and knowledge be one?

purport by His Divine Grace A.C.Bhaktivedanta Swami Prabhupada

The Mayavadi philosophers' position is that at the ultimate issue the individual is lost, everything becomes one, and there is no distinction between the knower, the knowable and knowledge. But by minute analysis we can see that this is not correct. Individuality is never lost, even when one thinks that the three different principles, namely the knower, the knowable and knowledge, are amalgamated or merged into one. The very concept that the three merge into one is another form of knowledge, and since the perceiver of the knowledge still exists, how can one say that the knower, knowledge and knowable have become one?

excerpt from Srimad Bhagavatam 3.27.16