In this piece of writing, we have considered the essence of intellect and its limit and ability in the cognitive process. For the purpose of this study, three different viewpoints- philosophy, Gnosticism and religion –have been considered. While considering various viewpoints, we’ve encountered disagreement, contradiction and diversity of opinions on intellect in itself 7 and its cognitive limit. All in all, we’ve met a comprehensive knowledge on intellect; meaning understanding. Intellect as understanding concludes that intellect prepares its ingredients and instruments from experimental, philosophy, Gnosticism, religion and other knowledge then analyses each of them. Each of these cognitive instruments has especial realm of study so none of them are able to know or deny the other. Conclusively, contradiction among them is sensible furthermore none can deny the other.