Optimism is a positive attitude, which can help us to remain calm and courageous in the face of difficulties and setbacks. Here are some famous sayings and aphorisms about optimism, hoping to inspire you to remain optimistic and face the challenges of life.

1. "Life is like a river, sometimes smooth, sometimes rough, but as long as you remain optimistic, you can find opportunities in adversity." This sentence expresses the importance of optimism in the face of difficulties. As long as we remain optimistic, we can find opportunities and grow in adversity.

2. "Optimists see problems, pessimists see obstacles." This sentence expresses the difference between optimism and pessimism. Optimists can see the opportunities and hopes behind problems, while pessimists only see difficulties and obstacles.

3. "Optimism is the sunshine of life, which enables us to see light in darkness and hope in difficulties." This sentence expresses the importance of optimism, which can help us see the light in the dark, see the hope in the difficulties and keep a positive attitude.

4. "An optimistic person is not without setbacks, but can quickly recover from setbacks and move on." This sentence expresses the resilience and tenacity of optimism. An optimistic person can recover quickly when encountering setbacks and failures, and move on without being overwhelmed by difficulties.

5. "Optimists can see the hope of the future, while pessimists can only see the present predicament." This sentence expresses the difference between optimism and pessimism. Optimists can see the hope and possibility of the future, while pessimists only see the current predicament and helplessness.

In short, these famous aphorisms express the importance of optimism and positive power in concise and profound language. Only by maintaining an optimistic attitude can we be full of hope and courage in life, overcome difficulties and challenges and meet a better future.