Of Christ's Unity of Being

We must now consider what pertains to Christ's unity in common. For, in their proper place, we must consider what pertains to unity and plurality in detail: thus we concluded (Question [9]) that there is not only one knowledge in Christ, and it will be concluded hereafter (Question [35], Article [2]) that there is not only one nativity in Christ.Hence we must consider Christ's unity (1) of being; (2) of will; (3) of operation.Under the first head there are two points of inquiry:(1) Whether Christ is one or two?(2) Whether there is only one being in Christ?

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Whether Christ is one or two?
Whether there is only one being in Christ?