Create a respectful and devotional art piece referencing a scene from the Bible, specifically Matthew 3:13-17. Depict the gathering at the river, where baptism is about to take place. The artwork should illustrate the intense presence of spiritual atmosphere. Use the pointillism technique, which is characterized by the ingenious application of small, distinct dots of color. It is like viewing an intricate mosaic in minuscule form. The resulting artwork creates a powerful impact that resonates with the essence of spiritual devotion in Christianity.