Many of the qualities that come so effortlessly to dogs - loyalty, devotion, selflessness, unflagging optimism, unqualified love - can be elusive to humans.

Dogs are a really amazing eye opener for us humans because their lives are compressed into such a short period, so we can see them go from puppyhood to adolescence to strong adulthood and then into their sunset years in 10 to 12 years. It really drives home the point of how finite all our lives are.

Dogs are great. Bad dogs, if you can really call them that, are perhaps the greatest of them all.

Such short little lives our pets have to spend with us, and they spend most of it waiting for us to come home each day.

A dog doesn't care if you are rich or poor, educated of illiterate, clever or dull. Give him your heart and he will give you his. It was really quite simple, and yet we humans, so much wiser and more sophisticated, have always had trouble figuring out what really counts and what does not.

Such short little lives our pets have to spend with us, and they spend most of it waiting for us to come home each day. It is amazing how much love and laughter they bring into our lives and even how much closer we become with each other because of them.

A person can learn a lot from a dog, even a loopy one like ours. Marley taught me about living each day with unbridled exuberance and joy, about seizing the moment and following your heart.