One thing I dont see mentioned here.
Research the spells. Take a glyph and purify it and then drag it and any others y ou are curious about and research it. be aware if there is no spell you are able to learn yet, or if you just fail that attempt of researching, it can hurt a bit, but you will heal, and live to try again, if you know to watch your health. I have never heard of anyone dying from repeated spell researching, but I guess it is possible, if you really try.
You do not need to know the name of a spell, just research it.
More can be found in the pswiki, I am sure. They are good for non-spoiler info.
ask around for that, or search it in forums, I am sure it is posted here somewhere.