Cats have no need of philosophy. Obeying their nature, they are content with the life it gives them. In humans, on the other hand, discontent with their nature seems to be natural. With predictably tragic and farcical results, the human animal never ceases striving to be something that it is not.
Cats make no such effort. Much of human life is a struggle for happiness. Among cats, on the other hand, happiness is the state to which they default when practical threats to their well-being are removed. That may be the chief reason many of us love cats. They possess as their birthright a felicity humans regularly fail to attain."
Cats do not need to examine their lives, because they do not doubt that life is worth living. If you doubt that life is worth living, you may want to read this book about cats who can be our teachers, because for them the good life is not a life they might have led but the life they already have.