Create a digital art representation of the biblical passage Luke 15:10, capturing this scene: There's a sense of serene joy permeating the environment, indicated through soft color gradients perhaps. In the middle, a solitary figure seen in a humble posture that suggests repentance. This figure is flanked by ethereal, celestial beings hovering around, signifying the presence of angels. Soft, glowing halos and warm, heavenly light surrounds them, representing their divinity and the joy they feel.