Acharya Prashant explains that the purpose of spirituality is not to provide happiness during difficult times, as that is the role of motivation. Instead, spirituality aims for liberation from the cycle of chasing happiness as a truth. He addresses the concern of physical weakness and dependence in old age, stating that a spiritual person values truth and liberation above all else and does not allow the body to become a master or a burden. If the body becomes a source of constant suffering and dependence, one should allow nature to take its course rather than artificially prolonging life through medical intervention without a meaningful purpose.