At the same time as trying to work out the divine proportions of man in two dimensions or painting during the Renaissance, they were also trying to rationalize through sculpting form how to communicate geometry. As there are seven stages in love, there are also seven divine proportions of man. For example we have from top to toe, the feet, the ankles to the kneecaps, the thighs to the body, your body to the neck, the neck, the head and arms. This can be equated with the seven ages of being of which the Donatello and Settignano, Martelli Saint John is in the forth stage of love or being or twelve to eighteen years. Therefore, inner geometry was used to equate mathematically the distance and width and breadth of the skull to the size of the feet.