Here's a philosophical rule of thumb: always start with the negative definitions. Negative definitions are always easier to understand. So, here's a negative definition. We must not conceive difference in terms of the differences we find between things that already exist. Difference is not empirical differences.
When we follow the reversal of normal experience, we find ourselves in an unusual, nearly mad experience. Being in an almost mad experience is not something we should fear: only in such experience are we jarred out of our common sense opinions and beliefs. It opens our minds to other ideas and thought. It makes us think.
The religious training inspired in me a desire for learning. In fact, I am immensely grateful for my Catholic education for instilling in me a desire for learning. However, the Catholic training also gave me a desire for questioning. The desire to question led me eventually to distance myself from the Catholic institution and its dogma.
