Reason is prerequisite to the acquisition of knowledge, as well as for the performance of a good deed or righteous act. Mystical states like ecstasy or intoxication, which involve the suppression of reason, are imperfect states of mind, and ideas that conflict with reason are false. However, reason is not self-sufficient, it cannot dispense with revelation, which alone gives the knowledge of realities that transcend it...
On the other hand, those who decry reason and affirm things that are false, revel in satanic states and evil practices, and cross the boundaries which the sense of discrimination (between good and evil) draws, with which God has endowed man and elevated him above other creatures.
- Ibn Taymiyyah
