Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 4
Fragment ID: 12959
If it was something in the heart, it must be the psychic being which is often felt as if deep down somewhere or rising out of a depth. If one goes to it, it is felt often as if one were going into a deep well.
The shock must have been the psychic force trying to open the mental and vital lid which covers the soul.