Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 3
The cry you heard was not in the physical heart, but in the emotional centre. The breaking of the wall meant the breaking of the obstacle or at least of some obstacle there between your inner and your outer being. Most people live in their ordinary outer ignorant personality which does not easily open to the 
Divine; but there is an inner being within them of which they do not know, which can easily open to the Truth and the Light. But there is a wall which divides them from it, a wall of obscurity and unconsciousness. When it breaks down, then there is a release; the feelings of calm, Ananda, joy which you had immediately afterwards were due to that release. The cry you heard was the cry of the vital part in you overcome by the suddenness of the breaking of the wall and the opening.