Nirvana is utterly unknowable. All attempts to describe or explain Nirvana must fail because the relative cannot describe or explain the Absolute. Nirvana represents unconditional surrender, a letting go of the world of appearance. There is no point in speculating. I think a Buddhist has no option but to sacrifice the intellect. Although reaching the end of letting go of intellect paradoxically requires the most challenging intellectual effort. Meditation provides a unique tool for this goal. Duality surrounds us; difference defines the world. Duality opens the door to non-duality. Duality is obvious. By logic, if there is duality, there also must be non-duality. Yet the word ‘non-duality’ itself renders an expression, a mere limitation, a samsaric concept. There is only silence. The non-dual – Nirvana = silence.