If the death of Christ on the cross is the true meaning of the Incarnation, then there is no gospel without the cross. Christmas by itself is no gospel. The life of Christ is no gospel. Even the resurrection, important as it is in the total scheme of things, is no gospel by itself. For the good news is not just that God became man, nor that God has spoken to reveal a proper way of life for us, or even that death, the great enemy, is conquered. Rather, the good news is that sin has been dealt with (of which the resurrection is a proof); that Jesus has suffered its penalty for us as our representative, so that we might never have to suffer it; and that therefore all who believe in Him can look forward to heaven.
James Montgomery Boice