One of the greatest gifts we receive from dogs is the tenderness they evoke in us. The disappointments of life, the injustices, the battering events that are beyond our control, and the betrayals we endure, from those we befriended and loved, can make us cynical and turn our hearts into flint – on which only the matches of anger and bitterness can be struck into flame. By their delight in being with us, the reliable sunniness of their disposition, the joy they bring to playtime, the curiosity with which they embrace each new experience, dogs can melt cynicism,and sweeten the bitter heart.
Dean Koontz, A Big Little Life:  A Memoir of a Joyful Dog
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