The surface meaning is straightforward: true liberation comes from acknowledging and embracing the present circumstances as they are, rather than resisting them. If you fight against what is, you create internal conflict and suffering.

In the context of modern non-dual teachings, particularly as articulated by Eckhart Tolle, this acceptance points towards the realization of your true nature beyond the thinking mind. The 'self' that resists is a construct of ego, a narrative built on past experiences and future anxieties. Tolle's work, drawing from traditions like Advaita Vedanta, emphasizes that the ego thrives on resistance. By accepting 'what is,' you disidentify from the egoic mind and its incessant judgments. This surrender isn't passive resignation but an active recognition of the underlying consciousness or 'Presence' that is always untouched by external events. It's about recognizing that the 'you' that suffers is the story you tell yourself about reality, not reality itself. The 'Power of Now' is the only place where this realization can occur, dissolving the illusion of separation and the suffering it breeds.

In your life: When faced with a difficult situation, try observing your resistance to it. Notice the thoughts and emotions that arise. Then, consciously practice acknowledging the reality of the situation without judgment, even if you don't like it. See if this shift in perspective changes your internal experience.