"High, healthful, pure thinking can be encouraged, promoted and strengthened.  Its current can be turned upon grand ideals until it forms a habit and wears a channel.  By means of such discipline the mental horizon can be flooded with the sunshine of beauty, wholeness, and harmony.  To inaugurate pure and lofty thinking may at first seem difficult, even almost mechanical, but perseverance will at length render it easy, then pleasant, and finally delightful."  William James, The Varieties of Religous Experience