From Quantum Physics and Theology by Sir Rev. Dr. John Polkinghorne:

The Christian God is not simply a compassionate spectator of the travail of creation, looking down from the invulnerability of a celestial realm onto the sufferings of Earth. Christians believe that in Christ, and particularly in his cross, we see God sharing human life and its bitterness, even to the point of shameful and painful death, experienced in darkness and rejection. The Christian God is the crucified God, truly a fellow sufferer who understands. This insight touches the problem of suffering at the deepest level at which it can be met.