"乐观是面对生活艰难困苦的果实"

Simplified Meaning:

When people go through tough times in life but choose to stay positive and hopeful, their positivity is like a reward or outcome of dealing with problems. Imagine a gardener who works hard to take care of their garden, even when the weather is bad. If the gardener keeps working and never gives up, eventually they will see beautiful flowers grow. This is similar to being optimistic after facing life's difficulties. For example, someone losing a job might feel sad and worried, but by believing something better will come, they stay motivated to search for new opportunities and keep their spirits high. Over time, this positive attitude helps them find new work and even gain new skills. So, this idea teaches us that by handling tough situations with hope and resilience, we can achieve a positive outlook on life.