Often we are unaware of our biases. A bias is a prejudice for or against a certain group. Often there is no reason for the bias. Your bias might be based on cultural background, economic background, religious background, social group, political party, etc. You might have formed that bias based on a negative interaction with someone from that group. Or the bias might be passed down from your parents. The way to break down this biases and be more empathetic is to spend time with people from different backgrounds. Get to know some people who are different to you. It will help you to see things from a different angle.