"Deben cambiar a menudo, aquellos que desearían ser constantes en la felicidad o la sabiduría."

The idea here is pretty straightforward: if you want to stay happy or become wise, you've got to be ready to change. Think about it. Life's a rollercoaster and sticking rigidly to one way of thinking or doing things can hold you back. Change is essential for growth and adapting to new situations is what keeps us resilient and wise.

This thought probably stems from centuries-old wisdom. Back in ancient times, when the world was changing at a slower pace, philosophers still understood the importance of being adaptable. Imagine how much more crucial it is now, when technology and society evolve at lightning speed. If you're not willing to change, you can easily get left behind, both in terms of happiness and wisdom.

Take the example of a professional athlete—let’s say a soccer player. In the early stages of their career, they might rely heavily on their physical prowess. But as they age, their speed and agility might decline. If they want to continue being successful, they need to adapt. They might focus on improving their strategic understanding of the game, or work on their leadership skills to become a mentor to younger players. By changing their approach, they can maintain their happiness and sense of purpose, while also growing wiser in their role.

So, how can you apply this in your life? Simple. Be open to new experiences. Don't shy away from challenges that push you out of your comfort zone. If you're in a job that's making you miserable, maybe it's time to consider a career change. If your relationships feel stagnant, perhaps you need to change how you communicate. The key is to keep evolving and not get stuck in one way of thinking.

Let me share a personal story. I once had a friend who was incredibly passionate about his job as a graphic designer. But the industry started shifting towards digital platforms and his skills in print design were becoming less relevant. He was initially resistant to change, worried that his years of experience would go to waste. But eventually, he realized that he needed to evolve to stay happy and relevant. He took courses in digital design and even learned some coding. It wasn’t easy—there were lots of late nights and moments of frustration. But in the end, he not only secured his job but discovered a new passion. He became more versatile and knowledgeable, and his happiness and confidence soared.

Imagine being in a similar situation. You’ve devoted years to one way of doing things, but then the world shifts and you’re faced with a choice: adapt or get left behind. Think about how empowering it is to choose change, to dive into something new and come out stronger on the other side. It's not just about survival—it's about thriving, about finding joy and wisdom in places you never thought to look.

So, next time you find yourself clinging to old ways, remember: happiness and wisdom aren't static. They evolve as you do. Embrace change, and you’ll find that you’re not just keeping up with life—you’re leading your own journey.