On the surface, this quote suggests that our sense of self, the ego, is constantly occupied with what has already happened or what might occur later. It implies that the ego cannot exist in the present moment, always looking backward for validation or forward for anticipation.

Within the framework of modern non-dual thought, particularly as articulated by Eckhart Tolle, this is more than a psychological observation; it points to the fundamental illusion of the egoic self. The ego constructs its identity from a collection of memories (the past) and imagined future scenarios (the future). This mental construct, the 'I' that we believe ourselves to be, is entirely dependent on this temporal framework. Tolle's teaching emphasizes that true consciousness, the formless awareness, is always present. The ego, by definition, is a thought-form, a pattern of identification with the mind's contents, which are inherently temporal. By clinging to past experiences and future anxieties, the ego perpetuates a sense of separation and suffering, mistaking these mental narratives for reality. The 'prisoner' is not just stuck in time, but is the very notion of being stuck, which is the ego's primary mode of operation.

In your life: Notice when your thoughts are dwelling on past regrets or future worries, and gently bring your attention back to the aliveness of this present moment.