Words of wisdom from Martin Luther:
The writings of all the holy fathers should be read only for a time, in order that though them we may be led to the Holy Scriptures. As it is, however, we read them only to be absorbed in them and never come to the Scriptures. We are like men who study that sign-posts and never travel the road. The dear fathers wished by their writing, to lead us to the Scriptures, but we so use them as to be led away from the Scriptures, though the Scriptures alone are our vineyard in which we ought all to work and toil.