One important element that must be in a life of a believer who wants to be a model is unity. In life, for you to succeed in anywhere, you must focus on the essential that unites you with the people around you, and ignore the essentials that divides you, because unity, begets greatness.
When the enemy wants to destroy an organization, a family, a group of happy friends, he plants the seed of disunity among them. You cannot talk about unity without love.
Disunity is disease, it is a cankerworm, so any Christian or believer that not maintain unity anywhere he finds himself, should not be a called a model believer.