"I am certainly not an authority on love because there are no authorities on love, just those who've had luck with it and those who haven't"

This quote by Bill Cosby speaks to the concept that love is a subjective experience. Everybody has their own distinct experience with love, and nobody can be an authority on it. Love is something that is unpredictable and can't be managed. It is something that is skilled in a different way by everyone, and nobody can be an expert on it. Cosby is recommending that the only method to understand love is to experience it for yourself. Those who have actually had luck with it have had favorable experiences, while those who have not have actually had negative experiences. Ultimately, love is something that is personal and can't be evaluated by anyone else.