The Red Devils lost their third match on the bounce when beaten by Watford 3-1 at Vicarage Road on Sunday.
Mourinho is well aware what has to occur within the playing group to return to winning ways and feels the rest of the squad could take some notice of the example winger Young set when coming off the bench to replace Anthony Martial just before half-time.
"I have this capacity of balance," Mourinho told MUTV.
"Balance is, for me, not running around the pitch when we were winning a couple of matches and nobody sees now me being too depressed. I'm sad.
"Obviously, I'm sad but, as I was telling the players, there is only one way.
"At 10:30 in the morning, we have a training session and we have to be there.
"They have to work, they have to show themselves with a certain kind of attitude towards negative moments. I show them, as an example, Ashley Young who was, in my opinion, phenomenal with his attitude, positivity and determination.
"We need positive people to give us a positive feeling because, next time these boys are going onto a football pitch, they are going to feel, obviously as normal human beings, the weight of the defeats."