One of the lessons that Jack Ma teaches us is that smart men use their brain. Anything that comes from another person is not meaningful if it does not challenge you to engage your own beliefs.
What you choose to feed into your mind works the same way as food. Allowing people to feed you their limiting beliefs is the equivalent of eating junk food. It is not good for you. Instead of letting others feed you limiting beliefs, start engaging you are own mind. Utilize your intellect to make informed decisions.
If you find it difficult to silence the negative opinions of people around you, then it might be time to find new individuals to surround yourself with. Of course, if you use your brain more, then you need to make sire that it’s as powerful as it can be
There are a lot of things that you can do to promote better brain function. For example, take up new activities to acquire new skills. Curiosity is quite empowering to the mind. Staying positive is another way to keep your brain working at peak efficiency.