Elizabeth Anscombe places an emphasis on the importance of philosophical psychology and "depth grammar". Her philosophy rediscovers the basic predispositions for a Christian vision of the human act. Human beings are the cause of their intentional acts, which is why it makes sense to speak about sin. We cannot, however, have a deeper knowledge of sin but in the light of Christian Revelation. Philosophy is supposed to be compatible with this Revelation and help for its understanding needs to be supported by an adequate renewal of methodology in which disciplines such as grammar, psychology or the philosophy of nature are interconnected.