I have been confused with these two words, but now I have an answer to it. a christian is someone that worships God every minute of his life. while an acting christian worships God once in a blue moon especially once a day or once a week(sunday).

feel free to add your if you think my opinion is wrong. thanks.

Hehehehehe. Funny! An acting Christian has not been sworn in by the chief Judge. Lol. Is there anything as an acting Christian? Or maybe you mean a hypocrite. Or someonr who claims to worship God, but it doesn't affect any facet of his life. He still does the same things an unbeliever would do or even worse, without any restraint or qualms of conscience, but goes to church every Sunday and sings and prays more than everyone else. (2 Timothy 3:5).