If he complains that the glimpse does not last, he should understand that it cannot last. Unless the mind and the heart are previously put into a properly prepared state to receive it, they will soon reject it. The process of rejection, however, is an unconscious one, for the active agents in it are the restlessness of his thoughts, the negativity of his emotions, the identification with the body, the strength of his desires and, in fact, all those things which constitute his ego. The forces which keep him apart from the higher state are within his personal self and not within that state. If he is unable to retain it, it is because he needs further purification and preparation, and its departure is really a signal indicating this need.