Visualize a significant moment from the Christian faith: Jesus invoking spiritual authority to his twelve disciples, enabling them to drive out impure spirits and heal illnesses. Depict different male figures from diverse descents including Caucasian, Black, Middle-Eastern, Hispanic, and South Asian in a serene, contemplative setting. The scene should convey a sense of empowerment, unity, and devotion. Please represent this in a style reminiscent of pre-1912 watercolor paintings, ensuring to maintain a respectful and devotional tone throughout the artwork. No textual elements should be included in the image.