Acharya Prashant addresses the issue of failure and disappointment by shifting the focus from seeking methods to understanding reality. He explains that action is often driven by an underlying suffering or a sense of lack, which he calls the 'mother suffering.' When one undertakes a project to alleviate this initial suffering, the project itself brings new challenges and the risk of failure. He emphasizes that worthy projects naturally carry a higher risk of failure, and if one is too pained by failure, the alternative is inaction, which results in even greater suffering. Therefore, the goal is not to avoid suffering but to choose a 'higher suffering'—one that comes from pursuing a meaningful cause.