"But a planet can also become dark because of "too strong a desire for security ... the greatest evil there is." Meg resists her father's analysis. What's wrong with wanting to be safe? Mr. Murry insists that "lust for security" forces false choices and a panicked search for safety and conformity. This reminded me that my grandmother would get very annoyed when anyone would talk about "the power of love." Love, she insisted, is not power, which she considered always coercive. To love is to be vulnerable; and it is only in vulnerability and risk--not safety and security--that we overcome darkness."