More Method than Magic
There was a time when magic and psychic methods were considered one. For marketability, many today choose to maintain an illusion of the paranormal, even though the analysis of another person without the input of pre-arranged information is more methodology than magic.
If you can train your mind to analyze input and data and form a sound theory, then you can read other people. These are skills to strengthen your people skills, build your relationships, understand other perspectives.
This isn't magic, it is a a scientific empowerment of extra-sensory perception.
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Everything in your environment is observed by your subconscious. Increased awareness simply allows the conscious to have better retrieval of the information from the subconscious.
You are developing E.S.P., extra-sensory perception. This is not a sixth sense, but a natural extension of the traditional senses: touch, sound, smell, sight, and taste. Our senses detect stimuli, translate them into electrical impulses and send them to the brain to be perceived as information. This transfer happens so quickly, so automatically, we do not give conscious thought to how we perceive what we see.