Create a digital art representation of a biblical scene inspired by Mark 1:14-15. In this image, depict a Middle-Eastern man standing in a historic region representing Galilee, passionately speaking to a multicultural crowd of men and women. He should appear to be sharing good news, with his body language symbolizing urgency and assurance. Use harmonic and intense colors to imply the importance and positivity of the message. Also hint at the symbolic 'kingdom of God' approaching, perhaps by including celestial motifs or a glowing horizon in the background.