I've had two cats and one dog as animal companions.
Dogs are like children. Even though it may seem like they do not know how to express it, they always know exactly what you've done.
Cats could care less if you like them or not. But be careful if you don't, they know how to stalk you better than your obsessive ex.
I look at them and I just know. They can see right into the middle of my soul.
Sometimes when I look into their eyes it's as if they know all of the secrets of the universe, and other times I think the only secret they can possibly teach me is how best to eat, sleep, and poop.
Yet, I think they have taught me more about love than I could have learned from anybody else.