The primary rules of obligation are those that require or forbid certain actions.
我对黑暗感兴趣。如果你不走进黑暗，你永远看不到光明。
解析：意与知、物紧密相连。
The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.
Innovation is not just about creating something new; it's about making what exists better.