The best way to combat evil is to promote good.
This, too, cannot be accomplished by ignoring evil.
The battle requires an enormous commitment on our part.
We cannot simply sit and wait for a good angel to intervene.
There is nothing wrong with believing that guardian angels keep an eye on us, but we must remember that ultimately we are responsible for most of the work – and from time to time, we can accept a little assistance from the angels.
–Rabbi Adin Steinsaltz
From an essay, "Good vs. Evil," July 19, 2007