Brain research suggests that it really depends upon which part of your brain is most active. Neuroscientists have found that when they stimulate certain areas of the brain with electrical impulses, they can get their subjects to learn more rapidly, solve problems that previously eluded them, and most recently, to be more appreciative of art.
A friend of mine once said to me, "I don't know what God is, but when I look at a butterfly or a flower, I know that I can't do that." It is possible to view the world this way -- with the acceptance of uncertainty and appreciative curiosity for the mundane -- because of a set of networks in the nervous system that I refer to as the "growth function."
So you believe owning a dog makes you a selfless person? Where is the selflessness of all the owners of abandoned and neglected dogs across the length and breadth of this country? Did their generosity take flight once they discovered their pooches were going to engage in rapid and wanton defecation?
A person with self-belief can aspire to be whoever they want to be, take their own path, strive confidently with aspirations, without getting bogged down in having to be who society tells them they are, what society tells them they should be, what society tells them they WILL be. A person with self-belief can thrive through their potential because they believe they are worthy.