For example, if one has only limited knowledge of Buddhist philosophy, e.g., the rarity and preciousness of human birth or the suffering nature of samsara, doubts about the viability of gaining liberation through Dharma practice, the methods to be used for attaining enlightenment, or the soundness of the practice being undertaken, to name a few, may arise during the course of one’s practice. Lacking the wisdom gained from an orderly training in the Dharma and from contemplation, one is incapable of solving these issues alone and thereby easily confused, which ultimately may turn into a kind of hindrance to one’s practice. Whereas gaining the requisite wisdom can be both helpful and encouraging. As practitioners of the Dharma, we should at the least have an adequate understanding of the key doctrines. Such knowledge is more than just needed for a true practitioner; it is indispensable.
~Depicted from THE RIGHT VIEW - The Four Noble Truths—the Path Out of Samsara