[RQ-Rules] Maintaining sorcery spells and other stories

[Clive Wickens]

Dear all,

Despite having read Sandy's Sorcery rules a few times I still find myself confused by the notion of 'maintaining' spells, how exactly does this process work, ie: how do you do it and what effect does it have ?

On a more generic note, spirit magic spells are generally weaker than divine magic,what would you say is the ratio in terms of power eg how many points of spirit magic would equal one point of divine magic for a similiar effect ?