Retrieving your soul is of little use if you lose it again. Rather than learning to recover your soul, it is preferable you learn how not to lose it again
And how do you lose it?
Whenever you give fixed judgments and definitions about yourself and others, your soul goes away and what you are left with are only judgments and definitions.
The soul is free, innocent, devoid of judgments and definitions. If there are judgments and definitions, there is no soul.
If you want to recover your soul, and avoid losing it all the time, stop judging yourself and others.Try to look, listen, feel yourself and others without judging, without describing the way you and other people are.
Learn to listen, look and feel yourself and others as a mystery, beyond words and impressions, ideas and beliefs.
If you are able to do this even for a few seconds, rejoice because you still have a piece of soul left. Then continue, do it for even longer, until you always do it. If you are not able to do it maybe it’s because you think you’re unable to do it. So, it’s just a matter of letting go of this judgment and then you’ve already done it.