Question: Would you say that the heart center sometimes opens for a few seconds end then closes again?Sri Chinmoy: It is true. Sometimes it opens for a few seconds, a few minutes, or few days; then it may close again. It is like a window. You can leave a window open for a minute, for an hour or for a few days; it is up to you. When aspiration is intense and we become fully one with our soul, this centre remains all the time open. Otherwise it is open for a minute or a day and then it closes again. But when the six major centres from ajna to muladhara are fully open, then it is very rare that one centre will close.
Sri Chinmoy, Kundalini: the Mother-Power, Aum Press, 1973