According to Osho, being beyond duality means resting as the witnessing consciousness—the One—rather than chasing the world’s opposites. Duality inevitably breeds conflict and restlessness; only in kaivalya, utter aloneness of awareness, does supreme peace arise. The very fact you recognize suffering proves a silent, nondual center is present. Establish yourself there; you can’t keep duality’s bustle and also be peaceful—choose the One, and unrest dissolves.
It means sitting in the quiet part inside you that watches everything, instead of being tugged between opposites, and from there you feel calm.