How May Esoteric Thinking and Traditions be Understood and Evaluated Philosophically?
It may also depend on how different the idea of the exoteric and esoteric are and what they entail. The first person who made me aware of the distinction was a school religious studies teacher. However, he was one of the most conventional Catholic thinkers I came across, especially opposed to the validity of comparative religion. I remember him saying that the Buddha believed he was God and mistaken, which seemed to gloss over the nature of spiritual thinking entirely. The teacher was a rigid thinker but I did meet him once later and he had softened so much, speaking of 'how memories come and go', and with what appeared to be far less concrete thinking.
I am inclined to think that concrete thinking is the problem, especially in why people hold onto dogmas, of both religion and science. The exoteric may be about the shared, or intersubjective guidelines for thinking, whereas the esoteric may involve the mysterious nature or conundrums of personal consciousness and its evolution. Each of us is living with the outer boundaries of intersubjective consciousness, tailoring it to the way in which the dramas of life enfold uniquely.
The esoteric thinkers may focus more on the subjective aspects and deviations from cultural norms, especially the development of one's own perspective and signature in the grand scheme of philosophy. It may involve relativism but, with more of an emphasis on lived experience, especially looking beyond the surface of ideas.
In that sense, it is about the unique and individual quest for understanding life and its meaning. It probably goes beyond actual concrete ideas of the nature of 'spirituality' , in a rigid sense, to the mythic aspects of what it means to be human. Here, I am not suggesting that it falls into a framework of Jungian or mythic interpretation, as it may involve the widest aspects of cultural interpretation, and anthropological perspectives.