Inspired by the scripture verse from Luke 15:10, illustrate a profoundly symbolic watercolor scene with a strong sense of respect and devotion towards Christianity. Depict a moment of pure joy among celestial beings, possibly angels, who are joyous and rejoicing. A metaphorical representation of a sinner's act of repentance could be portrayed as a humble figure bathed in light, kneeling, or performing some gesture of contrition. The manner of expressions, body language, and the overall composition should convey the emotion of divine joy and forgiveness.