一、常用表达

1. Cheer up! / Look on the bright side. / Think positive.

振作起来!/ 看好的一面 / 积极思考。

2. Be optimistic and positive.

乐观积极。

3. It's always better to be hopeful than desperate.

与其绝望不如抱有希望。

二、情景对话

职场鼓励：

"I'm sure we will win. You've worked so hard for this."

"I have every confidence in your promotion. You deserve it."

日常交流：

"Don't push your luck. I'm not Santa Claus."

"This is a setback, but it's a learning opportunity."

三、谚语补充

1. An optimist sees an opportunity in every calamity； a pessimist sees a calamity in every opportunity.

乐观的人在灾难中看到希望；悲观的人在希望中看到灾难。2. A man of gladness seldom falls into madness.

生性乐天的人极少会变成疯子。四、其他经典表达

表达信心：

"I'll have to shelve my plan. I'm convinced we can do it."

转移话题：

"Don’t be such a killjoy. Let's focus on the positive aspects."

建议根据具体场景选择表达，职场推荐使用"Think positive"或"Be optimistic"，日常交流则可用"Cheer up!"等更口语化的说法。搭配积极语境时，谚语能增强说服力。