When you already think you know everything, it's hard to see the world clearly. You might observe and experience what you're already expecting to see. These expectations are based on what has already happened, on what you've already learned. This could prevent you from seeing what's new. Try forgetting what you already know when observing something new, it may help you see what's really there. Don’t get blinded by your own knowledge. Keep your mind open to see clearly what is right in front of you.