How May Esoteric Thinking and Traditions be Understood and Evaluated Philosophically?
I have read 'Phaedo' a few years ago and did read some of the thread on it on this forum, which I found helpful in thinking about the book.
The entire idea of 'soul' is a very complex idea and used in such varying ways, including the question of the individual soul and beyond. I managed to think about it more clearly in relation to the transpersonal school of thought, including the ideas of Thomas More, which is more about the depths of human nature than a literal entity which survives as an individual construct.
You are quite right to say that there are no clear Christian teachings because there are so many cross currents of thought, ranging from influences as diverse as Egyptian idea and the blending of ideas from Plato and Aristotle, such as in the thinking of Augustine and Aquinas, as well as ideas of Plotinus and many influences.
It is probably wise to stay away from comparisons of Christianity and Buddhism which gloss over differences. I may have been influenced by such texts because I have read theosophical authors. Also, I probably dipped in and out of various Eastern texts in a rather chaotic manner, including those such as 'The Tibetan Book of the Dead'. In some ways, the academic study of the comparative religion is probably the most thorough. I did do a year of undergraduate studies in religious studies but that only covered the mere basics. Certainly, when studying Hinduism I was aware of the problems of translation and was at least fortunate to have a tutor who had studied Sanskrit.
There is a danger of oversimplification and generalisations in approaching the various traditions. I am sure that this can result in some very confused thinking. I am sure that I have blended ideas together in a very haphazard way at times and it is easy to end up with some very strange conclusions, which may show the dangers of the speculative imagination in philosophy.