Temper the steel means to forge it and shape it under intense heat. This perhaps can be done internally with one’s spirit. Like the Temperance card shows one foot is in the earth. The other is in the water. Like a plant the spirit needs to root itself and water to flow through it. the being has wings to catch the air and fly. The sun symbol resides on his forehead alluding to the fire of his mind, the upper will, burning within, also in his heart represented by the triangle, perhaps representative of alchemical sulphur, the fire of mind and soul, pulled into the heart. Is the water being poured downward, gathered into the cup? Or upward, drawn by the internal fire that tempers the body, that grows the spirit. like a blossoming flower.