There is a sense in which the nature of God’s own Godhood is such that God had to become incarnate. However, far from being a limitation, the Incarnation is the supreme act of God’s freedom and the concentration of God’s power in one person. God’s power is never aimless or wild. And no other limits God’s power. Divine power, true power, is limited insofar as it is always concentrated toward one goal or end. Any limitation is a self-limitation, and that for one end. For Forsyth, that end is the securing of holiness for God and for creation. Unlike the (super?)powers of this world, God’s use of power is ever with a view to love – to love the other, to love his enemies – a love that takes cruciform shape, dying even for those who would wish him dead.
… limitation is a power of Godhead, not a curtailment of it. Among the infinite powers of the Omnipotent must be the power to limit Himself, and among His glories the grace to bend and die. Incarnation is not impossible to the Infinite; it is necessary. If He could not come incarnate His infinitude would be partial and limited. It would not be complete. It would be limited to all that is outside human nature. It would be limited by human nature in the sense of not being able to enter it, of being stopped at its gates. God would be curtailed to the extent of His creation. And that would be a more fatal limitation to His power than any He could suffer from being in it. He may be in without being locked in. (PT Forsyth, God the Holy Father, 33)
Painting: Rembrandt’s Holy Family (1640); Oil on wood, 41 x 34 cm; Musee du Louvre, Paris.