All great ideas are dangerous. De Profundis

Rational behavior ... depends upon a ceaseless flow of data from the environment. It depends upon the power of the individual to predict, with at least a fair success, the outcome of his own actions. To do this, he must be able to predict how the environment will respond to his acts. Sanity, itself, thus hinges on man's ability to predict his immediate, personal future on the basis of information fed him by the environment. Future Shock

The guest who has escaped from the roof, will think twice before he comes back in by the door. The Two Towers

To stand in the midst of ... this whole marvelous uncertainty and rich ambiguity in existence without questioning, without trembling with the craving and the rapture of such questioning ... that is what I feel to be contemptible, and this is the feeling for which I look first in everybody. Some folly keeps persuading me that every human has this feeling just because he is human. The Gay Science