Eye of the soul

The mind is the eye of the soul, but not its force. Its force is in the heart; that is to say, the passions. The most enlightened reason does not give us the power to act and to will... Great thoughts come from the heart... Perhaps we owe to the passions the greatest accomplishments of the intellect... Reason and feeling advise and supplement each other turn by turn. Whoever consults only one of them, and renounces the other, foolishly deprives himself of a part of the resources given us
for our conduct.

Luc de Clapiers.