The mind and the heart make a good pair. The heart is an extremist: untamed, a single emotion will fill its entire space. The mind finds balance and harmony, even between opposites.
The mind is cold and aloof. To the mind, reality is a curiosity. But the heart lives in a real world where things matter.
When the heart listens to the vision of the mind, it too learns to carry a counterpoint of voices, even the voices of other hearts. When the mind listens to the depths of the heart, then its vision can go out into the world.