Render an image that showcases a religious figure related to Christianity, holding a winnowing fork in his hand on a threshing floor. He is engaged in the process of gathering wheat into a barn, and he is setting fire to the chaff, underlining the enduring nature of the flames. This pastoral scene should evoke a sense of devotion and respect toward Christianity. It should be created in a watercolor style, reminiscent of the pre-1912 art era, imbuing a sense of timelessness and tranquility. Ensure no words or text appear within the composition.