Everyone claims to be “Christian,” but that claim is meaningless if it’s void of substance.
Watch what flows from their mouth in their everyday communication when they’re being their self, (that’s what reveals what’s really inside of them).

Always believe scripture:

Mark 7.15

“There is nothing from without a man, that entering into him can defile him: but the things which come out of him, those are they that defile the man.”

Mark 7.20

“And he said, That which cometh out of the man, that defileth the man.”

Luke 6.45

“A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.”

Colossians 3.17

“And whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by him.”