Peripatetic scholars such as Avicenna, al-Kindi, and al-Farabi argue that the intellect unaided by divine unveiling (kashf) is sufficient in order for man to attain ultimate truth.
Sufis such as Bayazid Bastami, Rumi, and Ibn al-Arabi, contrarily argue that the limited human intellect is insufficient and misleading as a means of understanding ultimate truth.