"In prayerful silence you must look into your own heart. No one can tell you better than yourself what comes between you and God. Ask yourself. Then listen!"

In this quote by Johannes Tauler, the focus is on introspection and self-examination as a course to spiritual clearness and growth. Tauler, a German mystic of the 14th century, encourages a deep, individual inquiry into one's spiritual state, emphasizing the importance of silence, self-reflection, and inner discussion.

The concept of "prayerful silence" recommends a meditative state, a silencing of the external sound and distractions to focus inward. This silence is not simply the lack of noise but an active, deliberate time out to help with much deeper understanding. It is in this calm and serene state that one can access the depths of their own heart. By "heart", Tauler most likely refers not just to feelings but also to the core of one's being, one's true self, and spiritual center.

"No one can tell you better than yourself what comes in between you and God" underscores the personal nature of spiritual challenges and the distinct journey each individual has with their faith. It is a reminder that external voices, no matter how well-intentioned, can not define one's relationship with the divine. Everyone must take duty for determining their own barriers and understand what may be preventing their connection with God. This requires sincerity, courage, and a desire to challenge uncomfortable truths.

"Ask yourself" is an invite to participate in a dialogue with oneself. It needs presenting important concerns about one's beliefs, attitudes, actions, and desires. What are the interruptions, accessories, or fears that block your spiritual progress? This question is an important part of self-awareness and spiritual advancement.

"Then listen!" is possibly the most tough instruction. Listening implies being open to uneasy truths and insights that may occur. It suggests being receptive, client, and modest adequate to accept what is revealed. This listening is not passive however an active engagement with one's inner knowledge and conscience.

Overall, Tauler's quote encapsulates a profound method to spiritual growth, one that is deeply individual and introspective, focusing on the quiet, honest evaluation of the heart to discover and deal with the barriers in between oneself and the divine.