Adolf Koberle quote:

"The sanctification of conduct by the strengthening of the will; the sanctification of the emotions by a strenuous training of the soul; the sanctification of thought by a deepening of the understanding; moralism, mysticism, speculation, these are the three ladders on which men continually seek to climb up to God, with a persistent purpose that it seems nothing can check; a storming of Heaven that is just as pathetic in its unceasing efforts as in its final futility." (p. 2, The Quest for Holiness)