Affective forecasting errors occur when people misjudge how they will feel in the future, often overestimating both the intensity and duration of their emotional reactions to events. This happens because the human mind tends to focus too heavily on the most obvious aspects of a future experience, like winning an award or facing a setback, while neglecting how quickly other life factors, daily routines, and psychological adaptation will dampen those feelings. Mechanisms such as focalism (fixating on one event while ignoring broader context) and the impact bias (overestimating emotional consequences) explain why our predictions so often miss the mark. The implications of these errors are profound: they shape the decisions we make, from career moves to health choices, sometimes leading us toward goals that don’t truly deliver the fulfilment we expect. Recognising this limitation in our self-understanding can free us from chasing illusions of lasting happiness and instead encourage us to focus on cultivating resilience, balance, and meaning in the present. By appreciating how swiftly the mind adapts, we can make choices that nurture genuine wellbeing and protect our mental health, rather than being misled by inaccurate forecasts of joy or despair. If, in addition, we have given our lives to Jesus, the Holy Spirit will assist us in our forecasting. Often when we think of prophecy our minds go to more dramatic predictions, but we should remember that the prophetic gift of the Spirit often operates quietly and subtly in the small matters of everyday life, even enabling us to get a more accurate view of how we will react to coming events.