Are all human activities meaningless? Is there anything that will leave a sweet memory?

The question you're asking is philosophical and subjective, meaning it can vary from person to person. Here's a step-by-step breakdown:

1. "Are all human activities meaningless?" - This depends on one's perspective. Some people might argue that in the grand scheme of the universe, human activities are insignificant and thus meaningless. However, others might argue that human activities have meaning because they impact our lives, the lives of others, and the world around us. For example, acts of kindness can make someone's day better, scientific research can lead to important discoveries, and political actions can shape the course of a nation.

2. "Is there anything that will leave a sweet memory?" - Absolutely. Memories are subjective and are based on personal experiences. What leaves a sweet memory for one person might not for another. It could be anything from spending time with loved ones, achieving a goal, experiencing something new, or even simple moments of peace and contentment. These experiences can leave lasting, sweet memories.

In conclusion, while some might view human activities as meaningless in a universal context, they can have significant meaning on a personal or societal level. And yes, there are many things that can leave sweet memories, depending on personal experiences and perceptions.