Hishtapchus HaNefesh is a Breslov work focusing on the theme of prayer, specifically the personal prayers known as "hitbodedut." The title of the book, "Hishtapchus HaNefesh," translates to "outpouring of the soul," which aptly summarizes its central theme. The book is a guide for the practice of hitbodedut, emphasizing the concept of speaking to Hashem as one would converse with a best friend, freely expressing all thoughts, concerns, and feelings. Rebbe Nachman of Breslov, the founder of the Breslov Chasidic tradition, advocated for this practice, asserting that it is a cornerstone of spiritual development.

Hishtapchus HaNefesh was composed by Rabbi Alter of Teplik is mostly based on Likutay Moharan and Likutay Halachos, often quoting their exact wording.