Biblical view of mankind

I have been reading David McKay's book 'The Bond of Love' which is a well written book on Covenant Theology. Two things struck me early on, On p.87 he points out that evolution has an optimistic view of man . What he means by this is that evolution doing away with sin believes that mankind will keep progressing to become more and more godlike. You actually see this in science fiction shows like Star Trek where mankind is much kinder and more noble than their ancestors. He goes on to say, 'However unpalatable Covenant Theology's view of man may be, it is the only true anthropology, since based on divine revelation.' It is biblical anthropology that points to man in the image of God (which the evolutionists have done away with) as well as man the sinner. It is this biblical understanding of our nature that is sooooo observable from outside of ourselves and from within that led me to believe in the veracity of the Bible. As Calvin says in his institutes a true knowledge of ourselves can only be found in knowing God. When we see ourselves as we truly are, we see our sin, and our need of a saviour.

McKay then goes on to quote Thomas Boston 'ye are apt to think light of the sin ye were born in, and the corruption cleaving to your nature; but to know that God does not think light of these. it behoved to be an article of the covenant, that Christ should be born holy, and retain the holiness of human nature in him to the end; else the unholy birth and corrupt nature we derived from Adam, would have staked us all down eternally under the curse.' p.88