Sherlock Holmes: You've never complained about my methods before.
Dr. John Watson: I've never complained! When have I ever complained about you practising the violin at three in the morning, or your mess, your general lack of hygiene, your experiments on my dog, or the fact that you steal my clothes?
Sherlock Holmes: Never theorize before you have data. Invariably, you end up twisting facts to suit theories, instead of theories to suit facts.