"Si quieres ser un verdadero buscador de la verdad, es necesario que al menos una vez en tu vida dudes, tanto como sea posible, de todas las cosas."

Simplified Meaning:

To see the actual truth, you need to question everything around you at least once in your life. Picture a scientist who wants to discover if a new medicine works. She can't just trust what others say; she needs to test everything herself. Maybe friends, family, or society have always told you certain things, like a particular career is the only good choice, or a specific belief is true. To really understand what's right for you, sometimes you need to step back and question these ideas. Imagine you're building a puzzle, but some pieces don't fit. Instead of forcing them, you double-check every piece and the whole puzzle to find the truth. By doubting and questioning what you know, you can see the bigger picture and make decisions based on your own discoveries. So in your life, take time to question and explore, and be open to changing your views based on what you find. This way, you can grow and understand the world more clearly.