This is the view of England boss Gareth Southgate, who has remained with Maguire even after the Manchester United defender was sent off against Denmark last October.
It came just weeks after Maguire was found guilty of assault by a Greek court and the pressure and tension reportedly shattered lesser figures, although it clearly took its toll.
But Southgate’s faith during Maguire’s toughest time reaped rich rewards as the powerful center-half now puts in a stellar performance for England.
Maguire will likely remember that Nations League red card when he faces Denmark again in Wednesday’s semi-final.
But Southgate’s communication and support during these difficult days paid off.
Southgate said: “We are in contact with the players a lot when they are not with us – as much as we can.
“I try to respect the clubs and not interfere, but there are obvious times when things have happened and they need more support.
“The start of this season has been very difficult for Harry on several fronts.
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“So it’s great to see how he emerged with a lot more confidence as a leader. It shows within the group.
“Being captain of Manchester United is a huge challenge, a huge responsibility, but it has given him a lot more.
“You can see he has more confidence in himself and has taken it to another level not only on his game but on his maturity. “