The Texas native revealed he defines himself by five things: fatherhood, being a good husband, health, career and friendships, reported People magazine.
"I want to keep all five in healthy shape. If I don't keep maintenance on them, one of them is going to get weak," he said.
Sharing his best life advice with the graduates at the university where his father "Big Jim" McConaughey once played for the football team, he also warned the Class of 2015 to "not fall into the entitlement trap of feeling like a victim," said McConaughey.
The Oscar-winning actor, 45, also made it clear that nobody should ever use the word "unbelievable" - because nothing really is.
"If there's one thing you can depend on people being, it's people. I think unbelievable is an unbelievably stupid word," he added.