"A knowledge of the hidden side of life by no means teaches us to forget our dead, but it makes us exceedingly careful as to how we think of them; it warns us that we must adopt a resolutely unselfish attitude, that we must forget all about ourselves, and the pain of the apparent separation, and think of them neither with grief nor with longing, but always with strong affectionate wishes for their happiness and their progress. The clairvoyant sees exactly in what manner such wishes affect them, and at once perceives the truth which underlies the teaching of the Catholic Church with regard to the advisability of prayers for the dead. By these both the living and the dead are helped; for the former, instead of being thrown back upon his grief with a hopeless feeling that now he can do nothing, since there is a great gulf between himself and his loved one, is encouraged to turn his affectionate thought into definite action which promotes the happiness and advancement of him who has passed from his sight in the physical world."