Roma boss Mourinho took up his new role in Italy just a matter of days after being sacked by Tottenham, and he has now taken the time to reflect back on his career and a number of jobs that ended on sour terms.
"I make mistakes sometimes, I haven't always chosen the right project, or I may have been misled about the path of some projects," Mourinho told GQ.
"I've made mistakes or I've been led in a dishonest way into accepting what I shouldn't have, but in the end it's all the same.
"These aren't my words, they were said by someone who was much more important than me: Whoever has goals and drive, will never grow older.
"I still can't believe that I have 30 years of experience in professional football, or that I am 58 years old, because I am always renewing my motivation."
He continued: "Lately I've been having very different projects to before. I went to Manchester United in a phrase of transition, not to say decay.
"I went to Tottenham who don't have a history of success. Now I go to Roma with new owners, but I immediately felt this empathy with the owners, the director and they straight away reignited the fire and passion I have for my job.
"So here I go on another Mission: Impossible. I say impossible because people tend to look at me and in their eyes there's only one way to measure success, which is that I have to win."