There is an intuition in Life which similarly supports and guides the play and development of life in matter till it is ready for the mental evolution of which man is the vehicle. In man also the creation follows the same upward process,—the intuition within develops according to the stage he has reached in his progress. Even the precise intellect of the scientist, who is inclined to deny the separate existence or the superiority of intuition, yet cannot really move forward unless there is behind him a mental intuition which enables him to take a forward step or to divine what has to be done. Intuition therefore is present at the beginning of things and in their middle as well as at their consummation.
But Intuition takes its proper form only when one goes beyond the mental into the spiritual domain, for there only it comes fully forward from behind the veil and reveals its true and complete nature.
Ref: Letters on Yoga – I