Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 1
Fragment ID: 12103
These experiences are symbolic in their character, so there is no reason to be horrified by the green waters even if you did drown in a well in the last life. All such experiences should be observed 

quietly without alarm or depression or other such feelings. One can look at them and try to see or feel their meaning, but too active a speculation in the mind rather hinders than helps the seeing.
If you sink down into an unopened part and open it to the light or empty and clear it, that is a quite salutary and necessary operation and there is no reason for alarm. As for self-preservation, one does not drown in these inner wells – it is only a bath or a plunge. And if it happens to be the well of the psychic, nothing more salutary than to plunge into it.