ליקוטי מוהר״ן

The corpus contains explicit warnings against philosophy, speculative inquiry, external wisdom, human intellect detached from faith, and wisdom not grounded in deeds. But it also repeatedly praises holy intellect, Torah study, daat, depth, proofs, and careful analysis. So the precise thesis is not that Rebbe Nachman rejects intellect, but that he subordinates intellect to faith, mitzvot, simplicity, Torah, humility, and practice.

Rebbe Nachman can be read as sharply anti-philosophical and anti-rationalist in the sense that he warns against external wisdom, speculative inquiry, and intellect detached from faith or deeds. He is not anti-intellectual in a blanket sense: he valorizes Torah wisdom, daat, depth, and holy sechel, but insists that intellect must be governed by faith, temimut, mitzvot, prayer, and practice.