They don't know this...
A Warning Against Hypocrisy
As thousands of people gathered together, so that they were stepping on each other, Jesus said first to his disciples, "Be on the guard against the yeast of the Pharisees--I mean their hypocrisy. 2 Whatever is covered up will be uncovered, and every secret will be made known. 3 So then, whatever you have said in the dark will be heard in broad daylight, and whatever you have whispered in private in a closed room will be shouted from the housetops.
Whom to Fear
4 "I tell you, my friends, do not be afraid of those that kill the body but cannot afterward do anything worse. 5 I will show you whom to fear: fear God, who, after killing, has the authority to throw into hell. Believe me, he is the one you must fear!
6 Aren't five sparrows sold for two pennies? Yet not one sparrow is forgotten by God. 7 Even the hairs of your head have all been counted. So do not be afraid; you are worth much more than sparrows!
Confessing and Rejecting Christ
8 I assure you that whoever declares publicly that he belongs to me, the Son of Man will do the same for him before the angels of God. 9 But whoever rejects me publicly, the Son of Man will also reject him before the angels of God.*
*"Good New Bible," p.93