I wish there were someplace where they teach the (meta)physics of auras, maybe in the next yugas.
I think the practice of meditation and spending time with Masters either in their physical presence or by meditating and practicing the presence, these practices increase our sensitivity to auras and other transcendental experiences.
It also brings us into the presence of other meditative people who can sense such things. I recall having a girl friend years back that could see auras and while visiting an SRF nun to check my Kriya practice she remarked that my throat chakra was so bright and asked me why. I told her because I had a habit of singing regularly every day.