It means that the heart and mind works together. If you're open minded then you're also accepting, warm, and expansive. So if you have a closed heart you also have a closed mind. So we should have an open mind so that love flows through us without obstruction.
An open mind and open heart expand possibilities and can reveal anything that is holding you back. A open heart is like opening up to all the possibilities in your life. With an open mind and heart, you can shine a light on your dreams and live fully. They work as a team.