Buddhism and Christianity are rooted in the eastern and western cultures respectively. Basically, however, they both have the powerful deconstruction force towards Faith Fanaticism. As one of the most representative works of Chinese Buddhism, Dacheng Qi Xin Lun (On Faith in Mahayana) insists the thoughts of escaping from caring, argues that one should avoid fanaticism, keep the Middle way (iilM), so that Buddhism can develop healthily. Christianity develops the powerful deconstruction force through the doctrine of Grace. The doctrine of grace in Christianity, especially the doctrine of justification by faith, demands that following Jesus should be based on absolute trust, giving up any judgment and self - righteousness, avoiding all sorts of deviation from following Jesus. Firstly, these two concepts, that is, escaping from caring and Grace can help us in the understanding of deconstruction forces of Buddhism and Christianity. Then I will argue that escaping from caring and the doctrine of Grace has played a great role in human being's ultimate pursuit and the development of Buddhism and Christianity.