is upfront when it comes to discussing how his faith plays a central role in his life.
"It's the most important part of my life. I don't try to push it on anybody and I don't try to hide it," the Lone Survivor
actor, 42, told Parade
In fact, Wahlberg, who is Irish Catholic, often goes to church twice
"If the kids are good, I'll have doughnuts for them at 6:30 in the morning, and I'll say, 'You guys gotta let Mommy sleep in!' I'll go to church at 7:30 and everybody will be eating breakfast when I come home," he said.
"Then we'll go to church again at 10:30, if things aren't too hectic. Or if one of the kids has a game we'll watch them play. It's a nice family day."
Setting a good example for his four children
with wife Rhea Durham
was the motivation behind Wahlberg's getting his high-school diploma, which he received in June.
"I didn't want the kids saying, 'You didn't do it, so why do I need it?' They are all wanting to do things in their future that require an education," Wahlberg told PEOPLE