[Butz]

Wisdom Stat, wisdom level, 2 different things.
Wisdom level is your experience using prayers, you can't use a prayer of a higher level than your Wisdom Level, and raising it also allows you to bless to higher amounts.
Wisdom Stat is the base number next to the old guy on the status screen. It affects your ability to learn prayer spells. If it's low, you'll have a better chance of failing. Get Wis+ rings to fix it a little.