Our essence is change. We are movement. Being out of balance is life. Perfect balance. Stasis. That is death. Life yearns for perfection. Death is perfection.

Leela: Why are we listening to them? It is a waste of time.The Doctor; It is difficult to know what will be a waste of time until after the time has been wasted, by which...

Fourth Doctor: You know, the very powerful and the very stupid have one thing in common: they don’t alter their views to fit the facts; they alter the facts to fit their views.

You know, you are a classic example of the inverse ratio between the size of the mouth and the size of the brain.