Showing empathy to individuals allows a team, or squad that sometimes can be 25 players deep, to stay together as a unit.
That is the opinion of Marco Materazzi, 41, who reminisced about The Special One - Jose Mourinho - recently.
Materazzi and Mourinho played together during one of the most illustrious periods in Internazionale history as the Milan side claimed a historic treble in 2010, including the Champions League trophy.
Mourinho went on to boss Real Madrid before embarking on a second stint at current club Chelsea, while Materazzi - a World cup winner with Italy in 2006 - began the latest chapter in his career last month, signing as the player manager for Chennaiyin FC in the inaugural season of the Indian Super League.
Speaking to Sky Sports, Materazzi said: "Jose Mourinho is the best manager I have player under."
Elaborating on the traits that make Mourinho so special, he added: "He is a true person, a 100 percent true person and that for me is the first quality you must have if you want to be a manager.
“He never lied to the guys while he was at Inter. If something needed to be said he would tell the players to their faces.
“He’s an excellent motivator, a good strategist and a great manager. He creates empathy with the players and that is so important because when you have 25 players in a squad it can be difficult to keep them together as one every day.”
Chennaiyin are currently second in the Indian Super League table, with six points returned due to a brace of victories.