In just four seasons with the Golden State Warriors, head coach Steve Kerr has already cemented his place in the history books as one of the greatest coaches in history.

In his debut season, Kerr guided the Warriors to their first NBA championship in 40 years. He then followed it up with a record-breaking 73-win season in 2016 in which he was also awarded as the NBA Coach of the Year.

Last season, Kerr and his Warriors brought back the trophy to Oakland after going 16-1 overall in what was one of the most dominant post-season displays ever. The former Chicago Bulls guard is now looking to secure his third championship in four years and is currently just three wins away from glory.

Sure critics can say that Kerr is lucky to have some of the best players of their generation at his disposal, but one cannot deny how big a role he has played in the unprecedented accomplishments of the franchise.

With such an impeccable resume it would be easy for Kerr to surround himself with yes men in his coaching staff who would bow to his every whim. However, this just isn't his style. The 52-year-old believes that having a “truth-teller” — someone who is not afraid to call him out on his mistakes — is a commodity that is a prerequisite to success.

Luckily for him, Kerr has exactly this in the tenured Ron Adams, his 70-year-old assistant coach who has been in the coaching game since 1969 and an assistant coach in the NBA since 1992, as per K.C. Johnson of the Chicago Tribune. According to Kerr, he values Adams' inputs as much as his no nonsense demeanor.

“Ron is a truth teller,” said Kerr. “I wanted somebody who wasn’t afraid to say, ‘You screwed that up.’ We’ve had our dust-ups in a very productive way.”

Kerr's success is undeniable and his openness to criticism and willingness to accept his mistakes are surely two factors that have helped him reach the heights he has today.