Final answer:
The statement is true. Prophets and angels are often depicted with blank expressions on their faces to symbolize their piety and serenity.
Step-by-step explanation:
The statement is True. In Islamic tradition, both prophets and angels are often depicted with blank expressions on their faces. This is done to symbolize their piety and serenity. The prophets are considered to be the messengers of God, and their blank expressions reflect their focus on their divine mission. The angels, on the other hand, are believed to be pure beings who carry out God's will without any personal desires or emotions.