Ask someone who is an experienced psychonaut or meditator. These kinds of experiential shifts can, and does happen to people. In this guy's case, it was an awakening of empathy -- however, there are other kinds of awakening, other kinds of consciousness shifts that people are not normally aware of.
I have gone through some of these shifts and they made a profound impact on me. I'm still learning to integrate many of the things I learned into my life in such a way that I can function in a modern society and remain authentic. It's very, very hard.
Can you give examples of the other shifts you're referring to? I realize many of them may not have names (or may not have names in the western culture), but it would be very meaningful to me if you gave it a shot.
Awakening of empathy is one of them. There is also tele-empathy which lets you sense people who you could not have possibly read through body language.
Direct experience of "oneness" is another one. This can range from feeling the interconnections of everything, to feeling that all is One (monism), and there ever just the One.
Seeing through your acquired self is another. That sense that the acquired self -- the socialized personality -- has never been real. People often come back from that one thinking "my ego died". (Well, it often resurrects ;-)
Another is direct experience of Nothing (similar to the Oneness experience), where things somehow, mysteriously, spontaneously arises and passes. Also related is spaciousness.
Then there's a host of parapsychological effects which might make you feel crazy. They don't feel as insightful as the examples that I listed, but they do break down the conventional beliefs most people have and think of as "normal". For example, clairvoiyance, clairaudience, etc.
There are actually transpersonal psychologists holding Ph.D.s who specializes in counseling for spiritual emergence. There's a great thread on Quora related to that integration process. I'd find it right now, but my wife is waiting for me to go with her to the grocery store. ("Chop wood, carry water" You never thought you'd understand that koan, eh? :-D)
Feel free to email me at talktohosh at gmail.com if you want to continue this conversation.
This is from Bonnie Greenwall's book, The Awakening Guide:A companion for the Inner Journey. Greenwall holds a Ph.D. in transpersonal psychology, and did her dissertation on one of the awakening experiences following a Kundalini awakening experience of her own. She has since talked with many more people. This excerpt is more comprehensive than what I wrote.