Echoing Sylverthorne, these are getting decidedly harder to write.
Wielding power is one hell of a temptation. There are few problems a properly prepared wizard or cleric cannot solve. The issue is, of course, being that degree of prepared – and being mindful of how one uses power. Excessive demonstrations draw attention, and it rarely is the good kind of attention. More likely, the attention drawn is an expectation that power will be used to solve minor problems, along with attracting competing wielders.