says he is a "fun" but strict parent.
The 41-year-old actor - who has three-year-old son Levi and 15-month-old daughter Vida with his partner Camila Alves - is a "playful" dad but uses his life experience to make sure his kids
are well behaved.
He said: "Discipline is very cool. We run a tight and fun shift.
"I'm very playful but parents have the advantage of being around for so much longer. If we're going to sit there and teach our kids that life has consequences, they're going to turn 18 and go out in their own world.
"They're going to find it the hard way. You do it early so they understand how the world works and what is expected of them, not only as a citizen, but as their family name, as a McConaughey, things like that."
Matthew admits his concern comes from watching other people do a bad job with their children and see them turn out to be "junk".
He revealed in an interview with the Daily Record newspaper: "I've known too many kids - and some of them have been my friends - that did not turn out to be worth a c**p because the parents let them do whatever they wanted to do. They've turned to be junk."
The 'Lincoln Lawyer' star recently confessed he thinks his children have given his life more meaning.
He said: "I've got more to live for now, that's for sure! Obviously, you stop living as much for 'me' and living for 'we'. Everything I'm doing, my kids are doing with me . every move I make has to do with them."