The captain, thinking over this event afterward, realized that by his own lifelong standards he had a crew composed entirely of lunatics, with himself well to the front in degree of aberration; but he was fairly sure that this particular form of insanity was going to be useful. Hal Clement
Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them. Frank Herbert
There is within every human being a deep well of thinking over which a heavy iron lid is kept clamped. Sherwood Anderson
Acquire new knowledge whilst thinking over the old, and you may become a teacher of others. Confucius