Create a digital art representation of the biblical passage Ephesians 4:1-5, using traditional biblical art and imagery for inspiration. The drawing should not represent any specific figure but symbolically depict the essence of the passage, focusing on a serene, haloed figure dressed in robes. The figure should be proclaiming to a diverse group of people, indicating unity and the spirit of peace as described in the passage. In the background there should be a dove, symbolizing the Holy Spirit, soaring in the sky above the people. The color palette should favor soft, warm tones to add an air of spiritual calm and tranquility.