How to have true Intuition?

To have the true intuition one must get rid of the mind’s self-will, and the vital’s also, their preferences, fancies, fantasies, strong insistences and eliminate the mental and vital ego’s pressure which sets the consciousness to work in the service of its own claims and desires. Otherwise these things will come in with force and claim to be intuitions, inspirations and the rest of it. Or if any intuitions come, they can be twisted and spoiled by the mixture of these forces of the Ignorance.

Ref : Letters on Yoga Vol. II