It is one thing to study them. It is another thing to use their abilities. [ After all, he's done a great deal of study on such things since his initiation into the... knights errant, as it were. ]

Your initial question suggests you wish to awaken a persona in either yourself or another. That may be... dangerous.

[ He doesn't say it as a threat. Well, no more than anything else he says is menacing. There's something almost like concern in his voice. ]