This quote is about how we respond to things. "Sometimes it's better not to react" means there are moments when it's good to stay calm and not show a strong emotion. It's like taking a pause before answering or showing how you feel.
Imagine someone says something mean to you. "Sometimes it's better not to react" means instead of getting upset right away, it might be better to stay quiet and think about what to do. This can help you avoid making things worse.
In simple words, this quote tells us that it's okay to stay quiet and think before reacting in some situations. It's like taking a deep breath before answering, so you can make a better choice about what to say or do. Sometimes, not reacting right away can make things better.