This text explores the ontological nature of the past, present, and memory within the framework of process philosophy. The author highlights the asymmetry between the past, which can never regain actuality, and the future, which remains a realm of potentiality. While the future is met with anticipation or fear, the past is preserved through memory and physical relics. The paper defines the present not as a static point but as a duration—a continuous happening that leaves behind traces integrated into subsequent events. A crucial distinction is made between material components, such as organs or atoms, which maintain relative independence, and memory, which utilizes internal constructs and models. These mental models are entirely dependent on the internal arrangement and functioning of the event as a whole. Consequently, the author posits the necessity of an inner world where such models and programs are stored and integrated, following structures distinct from external reality. Ultimately, memory serves as a vital mechanism for maintaining continuity and integrating complex temporal events.