The fifth parable of 'The Hidden Treasure' covers the period from approximately 1500 - 1700 AD or the 'Reformation Church'. But contrary to popular opinion the treasure in this parable is not Jesus and we are not the man.
Before the Reformation, the ‘yeast’ had well and truly worked through the dough. The Church had returned to a view that resembled Pelagianism.
Luther was led by God to the conclusion that Christ was the sole mediator between God and man and that forgiveness of sin and salvation are effected by God’s grace alone and are received by faith alone on the part of man.
Also a brief look at the counter reformation.