..when you have an experience, you must never, during the period of the experience, try to understand what it is, for you immediately cause it to vanish, or you deform it and take away its purity; in the same way, if you want a spiritual teaching to enter into you, you must be absolutely immobile in your head, immobile like a mirror which not only reflects but absorbs the ray of light, lets it enter and go deep within, so that from the depths of your consciousness it may spring up again, some day or other, in the form of knowledge.
Ref: Questions And Answers 1956