What are the Christians trying to tell? Briefly, they are telling :

Of God's holiness

God is utterly holy, and His law therefore demands perfect holiness.
Because He is holy, God hates sin.
Sinners cannot stand before Him.

 

Of men's sin

Sin is a violation of God's law.
Sin is what makes true peace impossible for unbelievers.
All have sinned
Sin makes the sinner worthy of death.
Sinners can do nothing to earn salvation.
Sinners cannot change their own sin nature.
Sinners are therefore in a helpless state.

 

Of Jesus Christ and what He did

He is eternally God.
He is Lord of all.
He became man.
He is utterly pure and sinless.
The sinless one became a sacrifice for our sin.
He shed His own blood as an atonement for our sin.
He died on the cross to provide a way of salvation for sinners.
He rose triumphantly from the dead.
His righteousness is imputed to those who trust Him.
Thus He freely justifies all who trust in Him.

 

Of God's call to sinners

Repent.
Turn your heart from all that dishonours God.
Follow Jesus.
Trust Him as Lord and Saviour.

 

Of counting the cost first

Take up your cross.
Be prepared to follow Christ even to death.

 

Of trusting in Jesus