Unlike the magic of wizards, the magic of witches did not usually involve the application of much raw power. The difference is between hammers and levers. Witches generally tried to find the small point where a little change made a lot of result. To make an avalanche you can either shake the mountain, or maybe you can just find exactly the right place to drop a snowflake.

The Sea and Little Fishes - Terry Pratchett (via goldshitter)