Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.

Any sufficiently advanced technology is indistinguishable from magic.

要想做到公平公正，让人心服口服，就要赏罚分明。没有功劳的，就不能给予奖赏；没有罪过的，也不能任意给予处罚。

教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。