From the Robin Wood Tarot

At first the Chariot may seem impossible to control but as the Journey continues, the Fool grows in ability and confidence. At first he tried to control the Chariot through physical strength alone and suffered a few tumbles along the way. But he now understands that he also has an inner strength, to give direction and moderation to his power. The Strength card is associated with Leo and stands for courage and energy. The raw energy of the lion is at the service of the Maiden’s indomitable will.