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

Collaboration across disciplines is essential for groundbreaking discoveries.

幸福的幸里面是一个“幸”，不是一个“辛”。  或者理解成，Y=Why=为什么，I=我。幸福里面没有为什么，只有我。