Talent (a natural way of thinking, feeling, or behaving) × Investment (time spent practicing, developing your skills, and building your knowledge base) = Strength (the ability to consistently provide near-perfect performance)
People who have at least three or four very close friendships are healthier, have higher wellbeing, and are more engaged in their jobs. But the absence of any close friendships can lead to boredom, loneliness, and depression.