"只有两样东西是无限的，宇宙和人类的愚蠢，而我对前者不太确定。"

Simplified Meaning:

The quote highlights how vast and never-ending human foolishness can be. Think about situations where people repeatedly make the same mistakes despite having the opportunity to learn from them. For example, in history, wars have been fought for reasons that, in hindsight, seem trivial or misguided. Yet people keep making decisions that lead to conflict. This shows a kind of endlessness in not learning from past mistakes. On the other hand, the universe is also incredibly large and complex, but the speaker humorously suggests that human stupidity might be even more limitless. To apply this idea in life, it’s important to recognize our own mistakes and try to improve. Being aware of this can help one make better decisions, learn from experiences, and avoid repeatedly doing things that aren’t wise. Appreciating the boundless nature of human error can also make us more patient and understanding with others.