I think this can be a useful maxim to get you to the next day, but in reality it takes a lot more than one of anything for a fulfilling life. We grow and change and need novelty. We are held in a web of interdependent, ever-shifting relationships - with people, businesses, material goods, ecology. I think that generally people are seeking connection in a broader sphere. To be held in community, to have multiple significant identities (mother/wife/boss), to live in richness and abundance where any one thing is not make or break.