Answer:
I think he was both
Step-by-step explanation:
Behrmann was a painter and he had the ambition of painting a masterpiece. One his his neighbors, johnsy was down with pneumonia and had the belief that if the last leaf should fall off a particular plant, she won't recover from her illness.
As a great human being, Berhman was out painting in a snowy night for his neighbor with pneumonia. He felt the painting was going to save her life. This shows him to be a good person. Selfless and a good neighbor.
As a great painter, his painting of the lead appeared to be very realistic. Johnsy felt it was real. It helped her to recover.