All religions make differences between the sacred and the profane, and look into the divine world. Seeking the image of God, however, all religions constitute the attitude towards human life at the same time. Christianity puts emphasis on the creation of God, and regards human life as only the divine decree for glorifying God's Will. Buddhism focuses on the combination of principal and subsidiary causes, proposing that the existence of human life is nothing but changes due to cause and effect, having no essence of its own. The author in this paper tries to do comparative studies on the attitudes towards life between Christianity and Buddhism in order to figure out the fundamental differences between these two most important world religions.