It’s impossible to have a belief that wouldn’t reflect in our actions. Truthfully our actions are surer proof what we really believe. In a life of meaningful impact is what you truly seek, then selflessness is a cardinal virtue you have to demonstrate continually. You should learn be accomodating, open & helpful to people even when you barely know them. When this becomes your life habit, it is proof that you have attained some form of growth, because truly matured people lead selfless lives – they are always ready to give & help the growth of others.
Expression of selflessness reveals our true intentions.