The redeeming aspect of Christianity as a way of life is its philosophical core. That core is the idea that all evil be combatted with forgiveness. All other aspects – layers and layers of parallel theological, mythological, didactic, and religious representations – are all, basically, different forms of egotistic sectarianism.
But, forgiveness is different. Forgiveness is a way to egoless freedom and reconnection. Freedom for both forgiver and the forgived. It is a solution towards a different path, outside a linear cause-action-reaction time thread. It is not exactly moving back in time, but forgiveness allows the mind to discontinue its locked-in patterns. Therefore, it allows for a greater range of action, both in thoughts and movement. It reopens the world to possibilities.
The only way, however, for forgiveness to work is for both the forgiver and forgived to agree and accept the forgiveness, which explains why such little actual forgiveness happens.