Memories are stored thoughts, like all information we have accumulated. They have no “power” until we focus on them. Otherwise, they are like books we’ve already read on the shelf, unimportant unless we take them down and start reading again. They have “invisible” power only because, when they come to mind, Consciousness brings them to life and we re-experience them. If they are good memories, we call that reminiscing. If they are painful memories, we call it suffering. But no matter, memories are just thoughts, not things that are happening in the present. We decide how much time and attention to give them. When we turn away from them and come back to the present, they are gone.