Conceptualize an art piece that depicts the verse from Romans 1:1 - 'Paul, a servant of Jesus Christ, called to be an apostle, separated unto the gospel of God'. Paul, an apostle stands separated from the rest, his gaze on a shining representation of the gospel of God. The underlying theme should be of calling, servitude, and separation. Utilize a vivid, radiant palette and digital smoothness to mirror the consideration of digital art style. The art has to be striking, visually captivating yet staying true to the essence of the verse.